Adding NZGD2000 deformation model (versions 2000-01-01 to 2018-07-01)

45 files changed, 4210 insertions, 0 deletions

diff --git a/copyright_and_licenses.csv b/copyright_and_licenses.csv
index 143d4dc..dfbf512 100644
--- a/copyright_and_licenses.csv
+++ b/copyright_and_licenses.csv
@@ -156,6 +156,48 @@ nz_linz_lyttht1937-nzvd2016.tif,Land Information New Zealand,CC-BY-4.0
 nz_linz_motuht1953-nzvd2016.tif,Land Information New Zealand,CC-BY-4.0
 nz_linz_napiht1962-nzvd2016.tif,Land Information New Zealand,CC-BY-4.0
 nz_linz_nelsht1955-nzvd2016.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-20000101.json,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-20130801.json,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-20140201.json,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-20150101.json,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-20160701.json,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-20171201.json,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-20180701.json,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-c120100904-grid01.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-c220110222-grid01.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-c320110613-grid01.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-c420111223-grid01.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ch20160214-grid01.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-cs20130721-grid01.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-cs20130721-grid02.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ds20090715-grid011.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ds20090715-grid012.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ds20090715-grid013.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ds20090715-grid014.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-gs20071016-grid01.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ka20161114-grid01.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ka20161114-grid02.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ka20161114-grid03.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ka20161114-grid04.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ka20161114-grid05.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ka20161114-grid06.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ka20161114-grid07.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ka20161114-grid08.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ka20161114-grid09.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ka20161114-grid10.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ka20161114-grid11.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ka20161114-grid12.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-lg20130816-grid01.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-lg20130816-grid02.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-mq20041223-grid011.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-mq20041223-grid012.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-mq20041223-grid013.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-mq20041223-grid014.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-mq20041223-grid015.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-mq20041223-grid016.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ndm-grid01.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-ndm-grid02.tif,Land Information New Zealand,CC-BY-4.0
+nz_linz_nzgd2000-si20030821-grid01.tif,Land Information New Zealand,CC-BY-4.0
 nz_linz_nzgd2kgrid0005.tif,Land Information New Zealand,CC-BY-4.0
 nz_linz_nzgeoid2009.tif,Land Information New Zealand,CC-BY-4.0
 nz_linz_nzgeoid2016.tif,Land Information New Zealand,CC-BY-4.0
diff --git a/nz_linz/nz_linz_README.txt b/nz_linz/nz_linz_README.txt
index d55943a..13928e7 100644
--- a/nz_linz/nz_linz_README.txt
+++ b/nz_linz/nz_linz_README.txt
@@ -15,6 +15,23 @@ The New Zealand grids are published under the
 
 ## Included grids
 
+### NZGD2000 to ITRF96 transformation
+
+*Filename*: nz_linz_nzgd2000-(version).json
+*Reference*: https://www.linz.govt.nz/data/geodetic-system/datums-projections-and-heights/geodetic-datums/new-zealand-geodetic-datum-2000-nzgd2000/nzgd2000-deformation-model
+
+This is a set of deformation model files for each of the versions of the NZGD2000 datum.
+Each version is identified by a nominal publication date in yyyymmdd date format (for example nz_linz_nzgd2000-20180701.json. 
+The JSON files define the deformation model using a set of GeoTiff files, each of which is names with the prefix nz_linz_nzgd2000.
+Note that the transformation from ITRF96 to other realisations such as ITRF2008 should use the NZ specific transformations, for example EPSG:9082 to transform
+between between ITRF2008 and ITRF96.  These are documented in 
+https://www.linz.govt.nz/file/itrftonzgd2000pdf.
+
+Example of conversion from NZGD2000 to ITRF96 at epoch 2016.5
+
+  echo '173 -41 0 2016.5' | \
+     cct -t 2016.5 -d 8 +proj=defmodel +model=nz_linz_nzgd2000-20180701.json 
+
 ### NZGD1949 to NZGD2000 transformation  
 
 *Filename*: nz_linz_nzgd2kgrid0005.tif  
diff --git a/nz_linz/nz_linz_nzgd2000-20000101.json b/nz_linz/nz_linz_nzgd2000-20000101.json
new file mode 100644
index 0000000..eb885de
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-20000101.json
@@ -0,0 +1,90 @@
+{
+  "file_type": "deformation_model_master_file",
+  "format_version": "1.0",
+  "name": "NZGD2000 deformation model",
+  "version": "20000101",
+  "publication_date": "2000-01-01T00:00:00Z",
+  "license": "Creative Commons Attribution 4.0 International",
+  "description": "New Zealand Deformation Model.\nDefines the secular model (National Deformation Model)\nand patches for significant deformation events since 2000.\n",
+  "authority": {
+    "name": "Land Information New Zealand",
+    "url": "http://www.linz.govt.nz",
+    "address": "Level 7, Radio New Zealand House\r\n155 The Terrace\r\nPO Box 5501\r\nWellington 6145",
+    "email": "customersupport@linz.govt.nz"
+  },
+  "links": [
+    {
+      "href": "https://www.linz.govt.nz/nzgd2000",
+      "rel": "about",
+      "type": "text/html",
+      "title": "About the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000_deformation_model",
+      "rel": "source",
+      "type": "application/zip",
+      "title": "Authoritative source of the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://creativecommons.org/licenses/by/4.0/",
+      "rel": "license",
+      "type": "text/html",
+      "title": "Creative Commons Attribution 4.0 International license"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000/metadata/nzgd2000_deformation_20000101_metadata.xml",
+      "rel": "metadata",
+      "type": "application/xml",
+      "title": " ISO 19115 XML encoded metadata regarding the deformation model"
+    }
+  ],
+  "source_crs": "EPSG:4959",
+  "target_crs": "EPSG:7907",
+  "definition_crs": "EPSG:4959",
+  "reference_epoch": "2001-01-01T00:00:00Z",
+  "uncertainty_reference_epoch": "2018-12-01T00:00:00Z",
+  "horizontal_offset_unit": "metre",
+  "vertical_offset_unit": "metre",
+  "horizontal_uncertainty_type": "circular 95% confidence limit",
+  "horizontal_uncertainty_unit": "metre",
+  "vertical_uncertainty_type": "95% confidence limit",
+  "vertical_uncertainty_unit": "metre",
+  "horizontal_offset_method": "addition",
+  "extent": {
+    "type": "bbox",
+    "parameters": {
+      "bbox": [165.0,-48.0,180.0,-32.0]
+    }
+  },
+  "time_extent": {
+    "first": "1900-01-01T00:00:00Z",
+    "last": "2050-01-01T00:00:00Z"
+  },
+  "components": [
+    {
+      "description": "Secular deformation model derived from GNS model 1998b",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [165.0,-48.0,180.0,-32.0]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ndm-grid01.tif",
+        "md5_checksum": "86262382059a2ab6005558ee644642c8"
+      },
+      "time_function": {
+        "type": "velocity",
+        "parameters": {
+          "reference_epoch": "2000-01-01T00:00:00Z"
+        }
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/nz_linz/nz_linz_nzgd2000-20130801.json b/nz_linz/nz_linz_nzgd2000-20130801.json
new file mode 100644
index 0000000..0dba1e0
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-20130801.json
@@ -0,0 +1,514 @@
+{
+  "file_type": "deformation_model_master_file",
+  "format_version": "1.0",
+  "name": "NZGD2000 deformation model",
+  "version": "20130801",
+  "publication_date": "2013-08-01T00:00:00Z",
+  "license": "Creative Commons Attribution 4.0 International",
+  "description": "New Zealand Deformation Model.\nDefines the secular model (National Deformation Model)\nand patches for significant deformation events since 2000.\n",
+  "authority": {
+    "name": "Land Information New Zealand",
+    "url": "http://www.linz.govt.nz",
+    "address": "Level 7, Radio New Zealand House\r\n155 The Terrace\r\nPO Box 5501\r\nWellington 6145",
+    "email": "customersupport@linz.govt.nz"
+  },
+  "links": [
+    {
+      "href": "https://www.linz.govt.nz/nzgd2000",
+      "rel": "about",
+      "type": "text/html",
+      "title": "About the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000_deformation_model",
+      "rel": "source",
+      "type": "application/zip",
+      "title": "Authoritative source of the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://creativecommons.org/licenses/by/4.0/",
+      "rel": "license",
+      "type": "text/html",
+      "title": "Creative Commons Attribution 4.0 International license"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000/metadata/nzgd2000_deformation_20130801_metadata.xml",
+      "rel": "metadata",
+      "type": "application/xml",
+      "title": " ISO 19115 XML encoded metadata regarding the deformation model"
+    }
+  ],
+  "source_crs": "EPSG:4959",
+  "target_crs": "EPSG:7907",
+  "definition_crs": "EPSG:4959",
+  "reference_epoch": "2001-01-01T00:00:00Z",
+  "uncertainty_reference_epoch": "2018-12-01T00:00:00Z",
+  "horizontal_offset_unit": "metre",
+  "vertical_offset_unit": "metre",
+  "horizontal_uncertainty_type": "circular 95% confidence limit",
+  "horizontal_uncertainty_unit": "metre",
+  "vertical_uncertainty_type": "95% confidence limit",
+  "vertical_uncertainty_unit": "metre",
+  "horizontal_offset_method": "addition",
+  "extent": {
+    "type": "bbox",
+    "parameters": {
+      "bbox": [158.0,-58.0,194.0,-25.0]
+    }
+  },
+  "time_extent": {
+    "first": "1900-01-01T00:00:00Z",
+    "last": "2050-01-01T00:00:00Z"
+  },
+  "components": [
+    {
+      "description": "Secular deformation model derived from NUVEL-1A rotation rates\nSecular deformation model derived from GNS model 2011 V4",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.0,-58.0,194.0,-25.0]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ndm-grid02.tif",
+        "md5_checksum": "4120882dea2e3c6a878202a6959bb6f3"
+      },
+      "time_function": {
+        "type": "velocity",
+        "parameters": {
+          "reference_epoch": "2000-01-01T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Secretary Island (Fiordland) earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [165.85,-47.625,172.3,-43.5]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-si20030821-grid01.tif",
+        "md5_checksum": "0ec03ecf72777fac34df1719c2fe09f9"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2003-08-21T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Macquarie Plate earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.8,-53.0,179.5,-40.125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-mq20041223-grid011.tif",
+        "md5_checksum": "a71ac362dc67b06968e2090ac0155d60"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2004-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Macquarie Plate earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.8,-53.0,179.5,-40.125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-mq20041223-grid012.tif",
+        "md5_checksum": "81eaf03295f8cc4682220824f2e34513"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2004-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Macquarie Plate earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.8,-53.0,179.5,-40.125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-mq20041223-grid013.tif",
+        "md5_checksum": "db45cd6435655ad167fec21390354bc0"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2004-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Macquarie Plate earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.8,-53.0,179.5,-40.125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-mq20041223-grid014.tif",
+        "md5_checksum": "3d78b71f961b2ea472f37079a7dc9c0e"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2004-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Macquarie Plate earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.8,-53.0,179.5,-40.125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-mq20041223-grid015.tif",
+        "md5_checksum": "73e8b8976d1ee7f89cd2877fce64733c"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2004-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Macquarie Plate earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.8,-53.0,179.5,-40.125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-mq20041223-grid016.tif",
+        "md5_checksum": "152a8c97a9237d22fa77c9571ac0f546"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2004-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Fiordland (George Sound) earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [165.85,-47.0,171.25,-43.75]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-gs20071016-grid01.tif",
+        "md5_checksum": "7fa88760633267e788419dbf41824b8e"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2007-10-16T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Dusky Sound (Fiordland) earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [164.65,-51.375,179.5,-39.625]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ds20090715-grid011.tif",
+        "md5_checksum": "cfb5dabe570827d64c8e51488722e067"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "constant",
+          "after_last": "zero",
+          "model": [
+            {"epoch":"2009-07-15T00:00:00Z","scale_factor":-1.34},
+            {"epoch":"2009-07-15T00:00:00Z","scale_factor":-0.29},
+            {"epoch":"2011-09-01T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Dusky Sound (Fiordland) earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [164.65,-51.375,179.5,-39.625]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ds20090715-grid012.tif",
+        "md5_checksum": "2cc488f469a5977b65ddf5e365b57269"
+      },
+      "time_function": {
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+        "parameters": {
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+          "after_last": "zero",
+          "model": [
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+            {"epoch":"2009-07-15T00:00:00Z","scale_factor":-0.29},
+            {"epoch":"2011-09-01T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
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+      "displacement_type": "3d",
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+        }
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+          "after_last": "zero",
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+            {"epoch":"2009-07-15T00:00:00Z","scale_factor":-0.29},
+            {"epoch":"2011-09-01T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
+    {
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+            {"epoch":"2011-09-01T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
+    {
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+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
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+      },
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+        "md5_checksum": "e585b8230dc8a11917dd6bbf0372e745"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2010-09-04T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Christchurch February earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [170.8,-44.5,173.8,-42.375]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-c220110222-grid01.tif",
+        "md5_checksum": "ba61dca0e88a4fd87c19262bbd3e7450"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2011-02-22T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Christchurch June earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
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+        "parameters": {
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+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-c320110613-grid01.tif",
+        "md5_checksum": "96f18fe3d433bf25f9f57ae722bd7460"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2011-06-13T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Christchurch earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
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+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-c420111223-grid01.tif",
+        "md5_checksum": "ba3112904f5828722289fa1aa9fd9915"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2011-12-23T00:00:00Z"
+        }
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/nz_linz/nz_linz_nzgd2000-20140201.json b/nz_linz/nz_linz_nzgd2000-20140201.json
new file mode 100644
index 0000000..e301da1
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-20140201.json
@@ -0,0 +1,564 @@
+{
+  "file_type": "deformation_model_master_file",
+  "format_version": "1.0",
+  "name": "NZGD2000 deformation model",
+  "version": "20140201",
+  "publication_date": "2014-02-01T00:00:00Z",
+  "license": "Creative Commons Attribution 4.0 International",
+  "description": "New Zealand Deformation Model.\nDefines the secular model (National Deformation Model)\nand patches for significant deformation events since 2000.\n",
+  "authority": {
+    "name": "Land Information New Zealand",
+    "url": "http://www.linz.govt.nz",
+    "address": "Level 7, Radio New Zealand House\r\n155 The Terrace\r\nPO Box 5501\r\nWellington 6145",
+    "email": "customersupport@linz.govt.nz"
+  },
+  "links": [
+    {
+      "href": "https://www.linz.govt.nz/nzgd2000",
+      "rel": "about",
+      "type": "text/html",
+      "title": "About the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000_deformation_model",
+      "rel": "source",
+      "type": "application/zip",
+      "title": "Authoritative source of the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://creativecommons.org/licenses/by/4.0/",
+      "rel": "license",
+      "type": "text/html",
+      "title": "Creative Commons Attribution 4.0 International license"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000/metadata/nzgd2000_deformation_20140201_metadata.xml",
+      "rel": "metadata",
+      "type": "application/xml",
+      "title": " ISO 19115 XML encoded metadata regarding the deformation model"
+    }
+  ],
+  "source_crs": "EPSG:4959",
+  "target_crs": "EPSG:7907",
+  "definition_crs": "EPSG:4959",
+  "reference_epoch": "2001-01-01T00:00:00Z",
+  "uncertainty_reference_epoch": "2018-12-01T00:00:00Z",
+  "horizontal_offset_unit": "metre",
+  "vertical_offset_unit": "metre",
+  "horizontal_uncertainty_type": "circular 95% confidence limit",
+  "horizontal_uncertainty_unit": "metre",
+  "vertical_uncertainty_type": "95% confidence limit",
+  "vertical_uncertainty_unit": "metre",
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+    "parameters": {
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+    "last": "2050-01-01T00:00:00Z"
+  },
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+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
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+        "parameters": {
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+        }
+      },
+      "spatial_model": {
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+        "interpolation_method": "bilinear",
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+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
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+        }
+      }
+    },
+    {
+      "description": "Christchurch June earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
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+        "parameters": {
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+        }
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+      "spatial_model": {
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+        "interpolation_method": "bilinear",
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+        "md5_checksum": "96f18fe3d433bf25f9f57ae722bd7460"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2011-06-13T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Christchurch earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [171.55,-44.25,173.65,-42.75]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-c420111223-grid01.tif",
+        "md5_checksum": "ba3112904f5828722289fa1aa9fd9915"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2011-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Mw 6.6 Cook Strait earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
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+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-cs20130721-grid01.tif",
+        "md5_checksum": "ce1df6d56bf8b4249ba6552cfe776c6c"
+      },
+      "time_function": {
+        "type": "step",
+        "parameters": {
+          "step_epoch": "2013-07-21T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Mw 6.6 Lake Grassmere earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [170.95,-44.0,176.65,-39.25]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-lg20130816-grid01.tif",
+        "md5_checksum": "1cfe74b5a78e48d07c9841f1ffb826b1"
+      },
+      "time_function": {
+        "type": "step",
+        "parameters": {
+          "step_epoch": "2013-08-16T00:00:00Z"
+        }
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/nz_linz/nz_linz_nzgd2000-20150101.json b/nz_linz/nz_linz_nzgd2000-20150101.json
new file mode 100644
index 0000000..834209a
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-20150101.json
@@ -0,0 +1,564 @@
+{
+  "file_type": "deformation_model_master_file",
+  "format_version": "1.0",
+  "name": "NZGD2000 deformation model",
+  "version": "20150101",
+  "publication_date": "2015-01-01T00:00:00Z",
+  "license": "Creative Commons Attribution 4.0 International",
+  "description": "New Zealand Deformation Model.\nDefines the secular model (National Deformation Model)\nand patches for significant deformation events since 2000.\n",
+  "authority": {
+    "name": "Land Information New Zealand",
+    "url": "http://www.linz.govt.nz",
+    "address": "Level 7, Radio New Zealand House\r\n155 The Terrace\r\nPO Box 5501\r\nWellington 6145",
+    "email": "customersupport@linz.govt.nz"
+  },
+  "links": [
+    {
+      "href": "https://www.linz.govt.nz/nzgd2000",
+      "rel": "about",
+      "type": "text/html",
+      "title": "About the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000_deformation_model",
+      "rel": "source",
+      "type": "application/zip",
+      "title": "Authoritative source of the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://creativecommons.org/licenses/by/4.0/",
+      "rel": "license",
+      "type": "text/html",
+      "title": "Creative Commons Attribution 4.0 International license"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000/metadata/nzgd2000_deformation_20150101_metadata.xml",
+      "rel": "metadata",
+      "type": "application/xml",
+      "title": " ISO 19115 XML encoded metadata regarding the deformation model"
+    }
+  ],
+  "source_crs": "EPSG:4959",
+  "target_crs": "EPSG:7907",
+  "definition_crs": "EPSG:4959",
+  "reference_epoch": "2001-01-01T00:00:00Z",
+  "uncertainty_reference_epoch": "2018-12-01T00:00:00Z",
+  "horizontal_offset_unit": "metre",
+  "vertical_offset_unit": "metre",
+  "horizontal_uncertainty_type": "circular 95% confidence limit",
+  "horizontal_uncertainty_unit": "metre",
+  "vertical_uncertainty_type": "95% confidence limit",
+  "vertical_uncertainty_unit": "metre",
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+    "parameters": {
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+    "last": "2050-01-01T00:00:00Z"
+  },
+  "components": [
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+        }
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+    },
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+      "spatial_model": {
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+        "interpolation_method": "bilinear",
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+        "md5_checksum": "ba3112904f5828722289fa1aa9fd9915"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2011-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Mw 6.6 Cook Strait earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
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+        "md5_checksum": "ce1df6d56bf8b4249ba6552cfe776c6c"
+      },
+      "time_function": {
+        "type": "step",
+        "parameters": {
+          "step_epoch": "2013-07-21T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Mw 6.6 Lake Grassmere earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
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+        "parameters": {
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+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
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+        "md5_checksum": "1cfe74b5a78e48d07c9841f1ffb826b1"
+      },
+      "time_function": {
+        "type": "step",
+        "parameters": {
+          "step_epoch": "2013-08-16T00:00:00Z"
+        }
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/nz_linz/nz_linz_nzgd2000-20160701.json b/nz_linz/nz_linz_nzgd2000-20160701.json
new file mode 100644
index 0000000..5cd6df7
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-20160701.json
@@ -0,0 +1,589 @@
+{
+  "file_type": "deformation_model_master_file",
+  "format_version": "1.0",
+  "name": "NZGD2000 deformation model",
+  "version": "20160701",
+  "publication_date": "2016-07-01T00:00:00Z",
+  "license": "Creative Commons Attribution 4.0 International",
+  "description": "New Zealand Deformation Model.\nDefines the secular model (National Deformation Model)\nand patches for significant deformation events since 2000.\n",
+  "authority": {
+    "name": "Land Information New Zealand",
+    "url": "http://www.linz.govt.nz",
+    "address": "Level 7, Radio New Zealand House\r\n155 The Terrace\r\nPO Box 5501\r\nWellington 6145",
+    "email": "customersupport@linz.govt.nz"
+  },
+  "links": [
+    {
+      "href": "https://www.linz.govt.nz/nzgd2000",
+      "rel": "about",
+      "type": "text/html",
+      "title": "About the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000_deformation_model",
+      "rel": "source",
+      "type": "application/zip",
+      "title": "Authoritative source of the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://creativecommons.org/licenses/by/4.0/",
+      "rel": "license",
+      "type": "text/html",
+      "title": "Creative Commons Attribution 4.0 International license"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000/metadata/nzgd2000_deformation_20160701_metadata.xml",
+      "rel": "metadata",
+      "type": "application/xml",
+      "title": " ISO 19115 XML encoded metadata regarding the deformation model"
+    }
+  ],
+  "source_crs": "EPSG:4959",
+  "target_crs": "EPSG:7907",
+  "definition_crs": "EPSG:4959",
+  "reference_epoch": "2001-01-01T00:00:00Z",
+  "uncertainty_reference_epoch": "2018-12-01T00:00:00Z",
+  "horizontal_offset_unit": "metre",
+  "vertical_offset_unit": "metre",
+  "horizontal_uncertainty_type": "circular 95% confidence limit",
+  "horizontal_uncertainty_unit": "metre",
+  "vertical_uncertainty_type": "95% confidence limit",
+  "vertical_uncertainty_unit": "metre",
+  "horizontal_offset_method": "addition",
+  "extent": {
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+    "parameters": {
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+    "last": "2050-01-01T00:00:00Z"
+  },
+  "components": [
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+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2013-08-16T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Christchurch Valentines Day earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
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+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
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+        "md5_checksum": "3e51d726576358ec9fd1a0c20bd02e85"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2016-02-14T00:00:00Z"
+        }
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/nz_linz/nz_linz_nzgd2000-20171201.json b/nz_linz/nz_linz_nzgd2000-20171201.json
new file mode 100644
index 0000000..e87228d
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-20171201.json
@@ -0,0 +1,869 @@
+{
+  "file_type": "deformation_model_master_file",
+  "format_version": "1.0",
+  "name": "NZGD2000 deformation model",
+  "version": "20171201",
+  "publication_date": "2017-12-01T00:00:00Z",
+  "license": "Creative Commons Attribution 4.0 International",
+  "description": "New Zealand Deformation Model.\nDefines the secular model (National Deformation Model)\nand patches for significant deformation events since 2000.\n",
+  "authority": {
+    "name": "Land Information New Zealand",
+    "url": "http://www.linz.govt.nz",
+    "address": "Level 7, Radio New Zealand House\r\n155 The Terrace\r\nPO Box 5501\r\nWellington 6145",
+    "email": "customersupport@linz.govt.nz"
+  },
+  "links": [
+    {
+      "href": "https://www.linz.govt.nz/nzgd2000",
+      "rel": "about",
+      "type": "text/html",
+      "title": "About the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000_deformation_model",
+      "rel": "source",
+      "type": "application/zip",
+      "title": "Authoritative source of the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://creativecommons.org/licenses/by/4.0/",
+      "rel": "license",
+      "type": "text/html",
+      "title": "Creative Commons Attribution 4.0 International license"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000/metadata/nzgd2000_deformation_20171201_metadata.xml",
+      "rel": "metadata",
+      "type": "application/xml",
+      "title": " ISO 19115 XML encoded metadata regarding the deformation model"
+    }
+  ],
+  "source_crs": "EPSG:4959",
+  "target_crs": "EPSG:7907",
+  "definition_crs": "EPSG:4959",
+  "reference_epoch": "2001-01-01T00:00:00Z",
+  "uncertainty_reference_epoch": "2018-12-01T00:00:00Z",
+  "horizontal_offset_unit": "metre",
+  "vertical_offset_unit": "metre",
+  "horizontal_uncertainty_type": "circular 95% confidence limit",
+  "horizontal_uncertainty_unit": "metre",
+  "vertical_uncertainty_type": "95% confidence limit",
+  "vertical_uncertainty_unit": "metre",
+  "horizontal_offset_method": "addition",
+  "extent": {
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+    "parameters": {
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+    }
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+  "time_extent": {
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+    "last": "2050-01-01T00:00:00Z"
+  },
+  "components": [
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+        "parameters": {
+          "step_epoch": "2016-02-14T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [165.85,-47.625,179.05,-34.0]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid01.tif",
+        "md5_checksum": "d14be97de204f5b17c8052e6e5289bd4"
+      },
+      "time_function": {
+        "type": "step",
+        "parameters": {
+          "step_epoch": "2016-11-14T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [172.525,-42.90625,174.925,-41.28125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid02.tif",
+        "md5_checksum": "71d95d8ead7c68de034a62d11a2f5368"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2016-11-14T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "vertical",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [166.3,-47.625,179.05,-34.25]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid03.tif",
+        "md5_checksum": "5761fe541b3f54829d84041febae320b"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2016-11-14T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake postearthquake month 0-1,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [169.6,-43.75,176.35,-39.0]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid04.tif",
+        "md5_checksum": "d32e8f41e672f52f1ea07744d3aebd38"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "zero",
+          "after_last": "constant",
+          "model": [
+            {"epoch":"2016-11-14T00:00:00Z","scale_factor":0.0},
+            {"epoch":"2016-12-14T00:00:00Z","scale_factor":1.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake postearthquake month 0-1,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [172.45,-43.0,174.925,-41.28125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid05.tif",
+        "md5_checksum": "929daa6b723f9f410db35c61887f972f"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "constant",
+          "after_last": "zero",
+          "model": [
+            {"epoch":"2016-11-14T00:00:00Z","scale_factor":-1.0},
+            {"epoch":"2016-12-14T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake postearthquake month 0-1,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "vertical",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [171.85,-43.75,176.05,-40.5]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid06.tif",
+        "md5_checksum": "6733adf1b038113a459ebb2a3621fdc0"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "constant",
+          "after_last": "zero",
+          "model": [
+            {"epoch":"2016-11-14T00:00:00Z","scale_factor":-1.0},
+            {"epoch":"2016-12-14T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake,  14 November 2016\nRefinement for horizontal difference between observations and model",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [171.1,-43.5,177.4,-38.625]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid10.tif",
+        "md5_checksum": "595b70df573a2acc08ca902a58669302"
+      },
+      "time_function": {
+        "type": "step",
+        "parameters": {
+          "step_epoch": "2016-11-14T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake months1-3 post-earthquake,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [169.6,-43.75,176.35,-38.875]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid07.tif",
+        "md5_checksum": "25102ae59639311f331309a1db5e481d"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "zero",
+          "after_last": "constant",
+          "model": [
+            {"epoch":"2016-12-14T00:00:00Z","scale_factor":0.0},
+            {"epoch":"2017-02-14T00:00:00Z","scale_factor":1.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake months1-3 post-earthquake,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [172.45,-43.0,174.925,-41.28125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid08.tif",
+        "md5_checksum": "d5bb90fed04a852b712e12d2d6cd5903"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "constant",
+          "after_last": "zero",
+          "model": [
+            {"epoch":"2016-12-14T00:00:00Z","scale_factor":-1.0},
+            {"epoch":"2017-02-14T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake months1-3 post-earthquake,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "vertical",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [171.4,-43.625,175.9,-40.25]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid09.tif",
+        "md5_checksum": "5fd95407a15b207086c4170cc23a05a3"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "constant",
+          "after_last": "zero",
+          "model": [
+            {"epoch":"2016-12-14T00:00:00Z","scale_factor":-1.0},
+            {"epoch":"2017-02-14T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/nz_linz/nz_linz_nzgd2000-20180701.json b/nz_linz/nz_linz_nzgd2000-20180701.json
new file mode 100644
index 0000000..b79da6e
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-20180701.json
@@ -0,0 +1,919 @@
+{
+  "file_type": "deformation_model_master_file",
+  "format_version": "1.0",
+  "name": "NZGD2000 deformation model",
+  "version": "20180701",
+  "publication_date": "2018-07-01T00:00:00Z",
+  "license": "Creative Commons Attribution 4.0 International",
+  "description": "New Zealand Deformation Model.\nDefines the secular model (National Deformation Model)\nand patches for significant deformation events since 2000.\n",
+  "authority": {
+    "name": "Land Information New Zealand",
+    "url": "http://www.linz.govt.nz",
+    "address": "Level 7, Radio New Zealand House\r\n155 The Terrace\r\nPO Box 5501\r\nWellington 6145",
+    "email": "customersupport@linz.govt.nz"
+  },
+  "links": [
+    {
+      "href": "https://www.linz.govt.nz/nzgd2000",
+      "rel": "about",
+      "type": "text/html",
+      "title": "About the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000_deformation_model",
+      "rel": "source",
+      "type": "application/zip",
+      "title": "Authoritative source of the NZGD2000 deformation model"
+    },
+    {
+      "href": "https://creativecommons.org/licenses/by/4.0/",
+      "rel": "license",
+      "type": "text/html",
+      "title": "Creative Commons Attribution 4.0 International license"
+    },
+    {
+      "href": "https://www.geodesy.linz.govt.nz/download/nzgd2000/metadata/nzgd2000_deformation_20180701_metadata.xml",
+      "rel": "metadata",
+      "type": "application/xml",
+      "title": " ISO 19115 XML encoded metadata regarding the deformation model"
+    }
+  ],
+  "source_crs": "EPSG:4959",
+  "target_crs": "EPSG:7907",
+  "definition_crs": "EPSG:4959",
+  "reference_epoch": "2001-01-01T00:00:00Z",
+  "uncertainty_reference_epoch": "2018-12-01T00:00:00Z",
+  "horizontal_offset_unit": "metre",
+  "vertical_offset_unit": "metre",
+  "horizontal_uncertainty_type": "circular 95% confidence limit",
+  "horizontal_uncertainty_unit": "metre",
+  "vertical_uncertainty_type": "95% confidence limit",
+  "vertical_uncertainty_unit": "metre",
+  "horizontal_offset_method": "addition",
+  "extent": {
+    "type": "bbox",
+    "parameters": {
+      "bbox": [158.0,-58.0,194.0,-25.0]
+    }
+  },
+  "time_extent": {
+    "first": "1900-01-01T00:00:00Z",
+    "last": "2050-01-01T00:00:00Z"
+  },
+  "components": [
+    {
+      "description": "Secular deformation model derived from NUVEL-1A rotation rates\nSecular deformation model derived from GNS model 2011 V4",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.0,-58.0,194.0,-25.0]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ndm-grid02.tif",
+        "md5_checksum": "4120882dea2e3c6a878202a6959bb6f3"
+      },
+      "time_function": {
+        "type": "velocity",
+        "parameters": {
+          "reference_epoch": "2000-01-01T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Secretary Island (Fiordland) earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [165.85,-47.625,172.3,-43.5]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-si20030821-grid01.tif",
+        "md5_checksum": "0ec03ecf72777fac34df1719c2fe09f9"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2003-08-21T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Macquarie Plate earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.8,-53.0,179.5,-40.125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-mq20041223-grid011.tif",
+        "md5_checksum": "a71ac362dc67b06968e2090ac0155d60"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2004-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Macquarie Plate earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.8,-53.0,179.5,-40.125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-mq20041223-grid012.tif",
+        "md5_checksum": "81eaf03295f8cc4682220824f2e34513"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2004-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Macquarie Plate earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.8,-53.0,179.5,-40.125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-mq20041223-grid013.tif",
+        "md5_checksum": "db45cd6435655ad167fec21390354bc0"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2004-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Macquarie Plate earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.8,-53.0,179.5,-40.125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-mq20041223-grid014.tif",
+        "md5_checksum": "3d78b71f961b2ea472f37079a7dc9c0e"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2004-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Macquarie Plate earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.8,-53.0,179.5,-40.125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-mq20041223-grid015.tif",
+        "md5_checksum": "73e8b8976d1ee7f89cd2877fce64733c"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2004-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Macquarie Plate earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [158.8,-53.0,179.5,-40.125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-mq20041223-grid016.tif",
+        "md5_checksum": "152a8c97a9237d22fa77c9571ac0f546"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2004-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Fiordland (George Sound) earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [165.85,-47.0,171.25,-43.75]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-gs20071016-grid01.tif",
+        "md5_checksum": "7fa88760633267e788419dbf41824b8e"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2007-10-16T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Dusky Sound (Fiordland) earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [164.65,-51.375,179.5,-39.625]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ds20090715-grid011.tif",
+        "md5_checksum": "cfb5dabe570827d64c8e51488722e067"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "constant",
+          "after_last": "zero",
+          "model": [
+            {"epoch":"2009-07-15T00:00:00Z","scale_factor":-1.34},
+            {"epoch":"2009-07-15T00:00:00Z","scale_factor":-0.29},
+            {"epoch":"2011-09-01T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Dusky Sound (Fiordland) earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [164.65,-51.375,179.5,-39.625]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ds20090715-grid012.tif",
+        "md5_checksum": "2cc488f469a5977b65ddf5e365b57269"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "constant",
+          "after_last": "zero",
+          "model": [
+            {"epoch":"2009-07-15T00:00:00Z","scale_factor":-1.34},
+            {"epoch":"2009-07-15T00:00:00Z","scale_factor":-0.29},
+            {"epoch":"2011-09-01T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Dusky Sound (Fiordland) earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [164.65,-51.375,179.5,-39.625]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ds20090715-grid013.tif",
+        "md5_checksum": "65975868bb53148233b65a40a6f1ce5a"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "constant",
+          "after_last": "zero",
+          "model": [
+            {"epoch":"2009-07-15T00:00:00Z","scale_factor":-1.34},
+            {"epoch":"2009-07-15T00:00:00Z","scale_factor":-0.29},
+            {"epoch":"2011-09-01T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Dusky Sound (Fiordland) earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [164.65,-51.375,179.5,-39.625]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ds20090715-grid014.tif",
+        "md5_checksum": "5c157a6632225a3299bf78ec663dab26"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "constant",
+          "after_last": "zero",
+          "model": [
+            {"epoch":"2009-07-15T00:00:00Z","scale_factor":-1.34},
+            {"epoch":"2009-07-15T00:00:00Z","scale_factor":-0.29},
+            {"epoch":"2011-09-01T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Darfield earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [168.1,-46.75,176.2,-40.375]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-c120100904-grid01.tif",
+        "md5_checksum": "e585b8230dc8a11917dd6bbf0372e745"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2010-09-04T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Christchurch February earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [170.8,-44.5,173.8,-42.375]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-c220110222-grid01.tif",
+        "md5_checksum": "ba61dca0e88a4fd87c19262bbd3e7450"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2011-02-22T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Christchurch June earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [171.4,-44.375,173.65,-42.625]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-c320110613-grid01.tif",
+        "md5_checksum": "96f18fe3d433bf25f9f57ae722bd7460"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2011-06-13T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Christchurch earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [171.55,-44.25,173.65,-42.75]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-c420111223-grid01.tif",
+        "md5_checksum": "ba3112904f5828722289fa1aa9fd9915"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2011-12-23T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Mw 6.6 Cook Strait earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [171.55,-43.375,176.5,-39.5]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-cs20130721-grid02.tif",
+        "md5_checksum": "a0cb6d7871d5cffc51e121de1b154dfa"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2013-07-21T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Mw 6.6 Lake Grassmere earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [170.95,-44.0,176.65,-39.25]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-lg20130816-grid02.tif",
+        "md5_checksum": "9531a13d493c005f4102770f75118d92"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2013-08-16T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Christchurch Valentines Day earthquake",
+      "displacement_type": "3d",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [171.7,-44.125,173.65,-42.875]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ch20160214-grid01.tif",
+        "md5_checksum": "3e51d726576358ec9fd1a0c20bd02e85"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2016-02-14T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [165.85,-47.625,179.05,-34.0]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid01.tif",
+        "md5_checksum": "d14be97de204f5b17c8052e6e5289bd4"
+      },
+      "time_function": {
+        "type": "step",
+        "parameters": {
+          "step_epoch": "2016-11-14T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [172.525,-42.90625,174.925,-41.28125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid02.tif",
+        "md5_checksum": "71d95d8ead7c68de034a62d11a2f5368"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2016-11-14T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "vertical",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [166.3,-47.625,179.05,-34.25]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid03.tif",
+        "md5_checksum": "5761fe541b3f54829d84041febae320b"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2016-11-14T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake postearthquake month 0-1,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [169.6,-43.75,176.35,-39.0]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid04.tif",
+        "md5_checksum": "d32e8f41e672f52f1ea07744d3aebd38"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "zero",
+          "after_last": "constant",
+          "model": [
+            {"epoch":"2016-11-14T00:00:00Z","scale_factor":0.0},
+            {"epoch":"2016-12-14T00:00:00Z","scale_factor":1.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake postearthquake month 0-1,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [172.45,-43.0,174.925,-41.28125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid05.tif",
+        "md5_checksum": "929daa6b723f9f410db35c61887f972f"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "constant",
+          "after_last": "zero",
+          "model": [
+            {"epoch":"2016-11-14T00:00:00Z","scale_factor":-1.0},
+            {"epoch":"2016-12-14T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake postearthquake month 0-1,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "vertical",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [171.85,-43.75,176.05,-40.5]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid06.tif",
+        "md5_checksum": "6733adf1b038113a459ebb2a3621fdc0"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "constant",
+          "after_last": "zero",
+          "model": [
+            {"epoch":"2016-11-14T00:00:00Z","scale_factor":-1.0},
+            {"epoch":"2016-12-14T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake,  14 November 2016\nRefinement for horizontal difference between observations and model",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [171.1,-43.5,177.4,-38.625]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid10.tif",
+        "md5_checksum": "595b70df573a2acc08ca902a58669302"
+      },
+      "time_function": {
+        "type": "step",
+        "parameters": {
+          "step_epoch": "2016-11-14T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Kaikoura earthquake second refinement grid - horizontal",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [171.5,-43.425,175.76,-40.56]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid11.tif",
+        "md5_checksum": "b16bad259031e98607967e0fd2fb5541"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2016-11-14T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Kaikoura earthquake second refinement grid -vertical",
+      "displacement_type": "vertical",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [171.9,-43.365,176.2,-40.395]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid12.tif",
+        "md5_checksum": "cf80f1716f8744eeb6181bb596800c68"
+      },
+      "time_function": {
+        "type": "reverse_step",
+        "parameters": {
+          "step_epoch": "2016-11-14T00:00:00Z"
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake months1-3 post-earthquake,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [169.6,-43.75,176.35,-38.875]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid07.tif",
+        "md5_checksum": "25102ae59639311f331309a1db5e481d"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "zero",
+          "after_last": "constant",
+          "model": [
+            {"epoch":"2016-12-14T00:00:00Z","scale_factor":0.0},
+            {"epoch":"2017-02-14T00:00:00Z","scale_factor":1.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake months1-3 post-earthquake,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "horizontal",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [172.45,-43.0,174.925,-41.28125]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid08.tif",
+        "md5_checksum": "d5bb90fed04a852b712e12d2d6cd5903"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "constant",
+          "after_last": "zero",
+          "model": [
+            {"epoch":"2016-12-14T00:00:00Z","scale_factor":-1.0},
+            {"epoch":"2017-02-14T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    },
+    {
+      "description": "Event: Kaikoura earthquake months1-3 post-earthquake,  14 November 2016\n Source model: Geodetic source model, based on GPS, InSAR, and LiDAR data; elastic half-space assumption; \n Version: Model 002, 23 June 2017\n",
+      "displacement_type": "vertical",
+      "uncertainty_type": "none",
+      "horizontal_uncertainty": 0.01,
+      "vertical_uncertainty": 0.01,
+      "extent": {
+        "type": "bbox",
+        "parameters": {
+          "bbox": [171.4,-43.625,175.9,-40.25]
+        }
+      },
+      "spatial_model": {
+        "type": "GeoTIFF",
+        "interpolation_method": "bilinear",
+        "filename": "nz_linz_nzgd2000-ka20161114-grid09.tif",
+        "md5_checksum": "5fd95407a15b207086c4170cc23a05a3"
+      },
+      "time_function": {
+        "type": "piecewise",
+        "parameters": {
+          "before_first": "constant",
+          "after_last": "zero",
+          "model": [
+            {"epoch":"2016-12-14T00:00:00Z","scale_factor":-1.0},
+            {"epoch":"2017-02-14T00:00:00Z","scale_factor":0.0}
+          ]
+        }
+      }
+    }
+  ]
+}
diff --git a/nz_linz/nz_linz_nzgd2000-c120100904-grid01.tif b/nz_linz/nz_linz_nzgd2000-c120100904-grid01.tif
new file mode 100644
index 0000000..b809ff2
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-c120100904-grid01.tif
diff --git a/nz_linz/nz_linz_nzgd2000-c220110222-grid01.tif b/nz_linz/nz_linz_nzgd2000-c220110222-grid01.tif
new file mode 100644
index 0000000..1cf8401
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-c220110222-grid01.tif
diff --git a/nz_linz/nz_linz_nzgd2000-c320110613-grid01.tif b/nz_linz/nz_linz_nzgd2000-c320110613-grid01.tif
new file mode 100644
index 0000000..3b9fee9
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-c320110613-grid01.tif
diff --git a/nz_linz/nz_linz_nzgd2000-c420111223-grid01.tif b/nz_linz/nz_linz_nzgd2000-c420111223-grid01.tif
new file mode 100644
index 0000000..eda8954
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-c420111223-grid01.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ch20160214-grid01.tif b/nz_linz/nz_linz_nzgd2000-ch20160214-grid01.tif
new file mode 100644
index 0000000..6330fc9
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ch20160214-grid01.tif
diff --git a/nz_linz/nz_linz_nzgd2000-cs20130721-grid01.tif b/nz_linz/nz_linz_nzgd2000-cs20130721-grid01.tif
new file mode 100644
index 0000000..7c6beed
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-cs20130721-grid01.tif
diff --git a/nz_linz/nz_linz_nzgd2000-cs20130721-grid02.tif b/nz_linz/nz_linz_nzgd2000-cs20130721-grid02.tif
new file mode 100644
index 0000000..76cb4a3
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-cs20130721-grid02.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ds20090715-grid011.tif b/nz_linz/nz_linz_nzgd2000-ds20090715-grid011.tif
new file mode 100644
index 0000000..b8ee596
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ds20090715-grid011.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ds20090715-grid012.tif b/nz_linz/nz_linz_nzgd2000-ds20090715-grid012.tif
new file mode 100644
index 0000000..11fc604
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ds20090715-grid012.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ds20090715-grid013.tif b/nz_linz/nz_linz_nzgd2000-ds20090715-grid013.tif
new file mode 100644
index 0000000..f07e91b
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ds20090715-grid013.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ds20090715-grid014.tif b/nz_linz/nz_linz_nzgd2000-ds20090715-grid014.tif
new file mode 100644
index 0000000..6a5cc61
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ds20090715-grid014.tif
diff --git a/nz_linz/nz_linz_nzgd2000-gs20071016-grid01.tif b/nz_linz/nz_linz_nzgd2000-gs20071016-grid01.tif
new file mode 100644
index 0000000..5a33df1
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-gs20071016-grid01.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ka20161114-grid01.tif b/nz_linz/nz_linz_nzgd2000-ka20161114-grid01.tif
new file mode 100644
index 0000000..cfc0ad2
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ka20161114-grid01.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ka20161114-grid02.tif b/nz_linz/nz_linz_nzgd2000-ka20161114-grid02.tif
new file mode 100644
index 0000000..e6c17b9
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ka20161114-grid02.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ka20161114-grid03.tif b/nz_linz/nz_linz_nzgd2000-ka20161114-grid03.tif
new file mode 100644
index 0000000..bb67367
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ka20161114-grid03.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ka20161114-grid04.tif b/nz_linz/nz_linz_nzgd2000-ka20161114-grid04.tif
new file mode 100644
index 0000000..b70ada2
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ka20161114-grid04.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ka20161114-grid05.tif b/nz_linz/nz_linz_nzgd2000-ka20161114-grid05.tif
new file mode 100644
index 0000000..cb3461e
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ka20161114-grid05.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ka20161114-grid06.tif b/nz_linz/nz_linz_nzgd2000-ka20161114-grid06.tif
new file mode 100644
index 0000000..0eef9b2
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ka20161114-grid06.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ka20161114-grid07.tif b/nz_linz/nz_linz_nzgd2000-ka20161114-grid07.tif
new file mode 100644
index 0000000..ca7456c
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ka20161114-grid07.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ka20161114-grid08.tif b/nz_linz/nz_linz_nzgd2000-ka20161114-grid08.tif
new file mode 100644
index 0000000..6a7b2ff
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ka20161114-grid08.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ka20161114-grid09.tif b/nz_linz/nz_linz_nzgd2000-ka20161114-grid09.tif
new file mode 100644
index 0000000..614d3d4
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ka20161114-grid09.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ka20161114-grid10.tif b/nz_linz/nz_linz_nzgd2000-ka20161114-grid10.tif
new file mode 100644
index 0000000..413c47a
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ka20161114-grid10.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ka20161114-grid11.tif b/nz_linz/nz_linz_nzgd2000-ka20161114-grid11.tif
new file mode 100644
index 0000000..3549205
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ka20161114-grid11.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ka20161114-grid12.tif b/nz_linz/nz_linz_nzgd2000-ka20161114-grid12.tif
new file mode 100644
index 0000000..93b21a4
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ka20161114-grid12.tif
diff --git a/nz_linz/nz_linz_nzgd2000-lg20130816-grid01.tif b/nz_linz/nz_linz_nzgd2000-lg20130816-grid01.tif
new file mode 100644
index 0000000..8a791e9
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-lg20130816-grid01.tif
diff --git a/nz_linz/nz_linz_nzgd2000-lg20130816-grid02.tif b/nz_linz/nz_linz_nzgd2000-lg20130816-grid02.tif
new file mode 100644
index 0000000..729a8dc
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-lg20130816-grid02.tif
diff --git a/nz_linz/nz_linz_nzgd2000-mq20041223-grid011.tif b/nz_linz/nz_linz_nzgd2000-mq20041223-grid011.tif
new file mode 100644
index 0000000..00be77e
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-mq20041223-grid011.tif
diff --git a/nz_linz/nz_linz_nzgd2000-mq20041223-grid012.tif b/nz_linz/nz_linz_nzgd2000-mq20041223-grid012.tif
new file mode 100644
index 0000000..b876185
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-mq20041223-grid012.tif
diff --git a/nz_linz/nz_linz_nzgd2000-mq20041223-grid013.tif b/nz_linz/nz_linz_nzgd2000-mq20041223-grid013.tif
new file mode 100644
index 0000000..1df1f3c
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-mq20041223-grid013.tif
diff --git a/nz_linz/nz_linz_nzgd2000-mq20041223-grid014.tif b/nz_linz/nz_linz_nzgd2000-mq20041223-grid014.tif
new file mode 100644
index 0000000..8c20e20
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-mq20041223-grid014.tif
diff --git a/nz_linz/nz_linz_nzgd2000-mq20041223-grid015.tif b/nz_linz/nz_linz_nzgd2000-mq20041223-grid015.tif
new file mode 100644
index 0000000..c39cccc
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-mq20041223-grid015.tif
diff --git a/nz_linz/nz_linz_nzgd2000-mq20041223-grid016.tif b/nz_linz/nz_linz_nzgd2000-mq20041223-grid016.tif
new file mode 100644
index 0000000..6eaa8a5
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-mq20041223-grid016.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ndm-grid01.tif b/nz_linz/nz_linz_nzgd2000-ndm-grid01.tif
new file mode 100644
index 0000000..072f977
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ndm-grid01.tif
diff --git a/nz_linz/nz_linz_nzgd2000-ndm-grid02.tif b/nz_linz/nz_linz_nzgd2000-ndm-grid02.tif
new file mode 100644
index 0000000..b38dfdf
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-ndm-grid02.tif
diff --git a/nz_linz/nz_linz_nzgd2000-si20030821-grid01.tif b/nz_linz/nz_linz_nzgd2000-si20030821-grid01.tif
new file mode 100644
index 0000000..f07d50b
--- /dev/null
+++ b/nz_linz/nz_linz_nzgd2000-si20030821-grid01.tif
diff --git a/travis/expected_main.lst b/travis/expected_main.lst
index 13e0e6c..1009632 100644
--- a/travis/expected_main.lst
+++ b/travis/expected_main.lst
@@ -156,6 +156,48 @@ nz_linz_lyttht1937-nzvd2016.tif
 nz_linz_motuht1953-nzvd2016.tif
 nz_linz_napiht1962-nzvd2016.tif
 nz_linz_nelsht1955-nzvd2016.tif
+nz_linz_nzgd2000-20000101.json
+nz_linz_nzgd2000-20130801.json
+nz_linz_nzgd2000-20140201.json
+nz_linz_nzgd2000-20150101.json
+nz_linz_nzgd2000-20160701.json
+nz_linz_nzgd2000-20171201.json
+nz_linz_nzgd2000-20180701.json
+nz_linz_nzgd2000-c120100904-grid01.tif
+nz_linz_nzgd2000-c220110222-grid01.tif
+nz_linz_nzgd2000-c320110613-grid01.tif
+nz_linz_nzgd2000-c420111223-grid01.tif
+nz_linz_nzgd2000-ch20160214-grid01.tif
+nz_linz_nzgd2000-cs20130721-grid01.tif
+nz_linz_nzgd2000-cs20130721-grid02.tif
+nz_linz_nzgd2000-ds20090715-grid011.tif
+nz_linz_nzgd2000-ds20090715-grid012.tif
+nz_linz_nzgd2000-ds20090715-grid013.tif
+nz_linz_nzgd2000-ds20090715-grid014.tif
+nz_linz_nzgd2000-gs20071016-grid01.tif
+nz_linz_nzgd2000-ka20161114-grid01.tif
+nz_linz_nzgd2000-ka20161114-grid02.tif
+nz_linz_nzgd2000-ka20161114-grid03.tif
+nz_linz_nzgd2000-ka20161114-grid04.tif
+nz_linz_nzgd2000-ka20161114-grid05.tif
+nz_linz_nzgd2000-ka20161114-grid06.tif
+nz_linz_nzgd2000-ka20161114-grid07.tif
+nz_linz_nzgd2000-ka20161114-grid08.tif
+nz_linz_nzgd2000-ka20161114-grid09.tif
+nz_linz_nzgd2000-ka20161114-grid10.tif
+nz_linz_nzgd2000-ka20161114-grid11.tif
+nz_linz_nzgd2000-ka20161114-grid12.tif
+nz_linz_nzgd2000-lg20130816-grid01.tif
+nz_linz_nzgd2000-lg20130816-grid02.tif
+nz_linz_nzgd2000-mq20041223-grid011.tif
+nz_linz_nzgd2000-mq20041223-grid012.tif
+nz_linz_nzgd2000-mq20041223-grid013.tif
+nz_linz_nzgd2000-mq20041223-grid014.tif
+nz_linz_nzgd2000-mq20041223-grid015.tif
+nz_linz_nzgd2000-mq20041223-grid016.tif
+nz_linz_nzgd2000-ndm-grid01.tif
+nz_linz_nzgd2000-ndm-grid02.tif
+nz_linz_nzgd2000-si20030821-grid01.tif
 nz_linz_nzgd2kgrid0005.tif
 nz_linz_nzgeoid2009.tif
 nz_linz_nzgeoid2016.tif