Add a +proj=tinshift for triangulation-based transformations

Implements RFC-6

3 files changed, 146 insertions, 0 deletions

diff --git a/data/tests/tinshift_crs_implicit.json b/data/tests/tinshift_crs_implicit.json
new file mode 100644
index 00000000..e1939fd0
--- /dev/null
+++ b/data/tests/tinshift_crs_implicit.json
@@ -0,0 +1,46 @@
+{
+  "file_type": "triangulation_file",
+  "format_version": "1.0",
+  "name": "Name",
+  "version": "Version",
+  "publication_date": "2018-07-01T00:00:00Z",
+  "license": "Creative Commons Attribution 4.0 International",
+  "description": "Test triangulation",
+  "authority": {
+    "name": "Authority name",
+    "url": "http://example.com",
+    "address": "Adress",
+    "email": "test@example.com"
+  },
+  "links": [
+    {
+      "href": "https://example.com/about.html",
+      "rel": "about",
+      "type": "text/html",
+      "title": "About"
+    },
+    {
+      "href": "https://example.com/download",
+      "rel": "source",
+      "type": "application/zip",
+      "title": "Authoritative source"
+    },
+    {
+      "href": "https://creativecommons.org/licenses/by/4.0/",
+      "rel": "license",
+      "type": "text/html",
+      "title": "Creative Commons Attribution 4.0 International license"
+    },
+    {
+      "href": "https://example.com/metadata.xml",
+      "rel": "metadata",
+      "type": "application/xml",
+      "title": " ISO 19115 XML encoded metadata regarding the deformation model"
+    }
+  ],
+  "transformed_components": [ "horizontal" ],
+  "vertices_columns": [ "source_x", "source_y", "target_x", "target_y" ],
+  "triangles_columns": [ "idx_vertex1", "idx_vertex2", "idx_vertex3" ],
+  "vertices": [ [2,49,2.1,49.1], [3,50,3.1,50.1], [2, 50, 2.1,50.1] ],
+  "triangles": [ [0, 1, 2] ]
+}
diff --git a/data/tests/tinshift_simplified_kkj_etrs.json b/data/tests/tinshift_simplified_kkj_etrs.json
new file mode 100644
index 00000000..7d46107f
--- /dev/null
+++ b/data/tests/tinshift_simplified_kkj_etrs.json
@@ -0,0 +1,50 @@
+{
+  "file_type": "triangulation_file",
+  "format_version": "1.0",
+  "name": "Name",
+  "version": "Version",
+  "publication_date": "2018-07-01T00:00:00Z",
+  "license": "Creative Commons Attribution 4.0 International",
+  "description": "Test triangulation",
+  "authority": {
+    "name": "Authority name",
+    "url": "http://example.com",
+    "address": "Adress",
+    "email": "test@example.com"
+  },
+  "links": [
+    {
+      "href": "https://example.com/about.html",
+      "rel": "about",
+      "type": "text/html",
+      "title": "About"
+    },
+    {
+      "href": "https://example.com/download",
+      "rel": "source",
+      "type": "application/zip",
+      "title": "Authoritative source"
+    },
+    {
+      "href": "https://creativecommons.org/licenses/by/4.0/",
+      "rel": "license",
+      "type": "text/html",
+      "title": "Creative Commons Attribution 4.0 International license"
+    },
+    {
+      "href": "https://example.com/metadata.xml",
+      "rel": "metadata",
+      "type": "application/xml",
+      "title": " ISO 19115 XML encoded metadata regarding the triangulation"
+    }
+  ],
+  "input_crs": "EPSG:2393",
+  "output_crs": "EPSG:3067",
+  "transformed_components": [ "horizontal" ],
+  "vertices_columns": [ "source_x", "source_y", "target_x", "target_y" ],
+  "triangles_columns": [ "idx_vertex1", "idx_vertex2", "idx_vertex3" ],
+  "vertices": [ [3244102.707, 6693710.937, 244037.137, 6690900.686],
+                [3205290.722, 6715311.822, 205240.895, 6712492.577],
+                [3218328.492, 6649538.429, 218273.648, 6646745.973] ],
+  "triangles": [ [0, 1, 2] ]
+}
diff --git a/data/tests/tinshift_simplified_n60_n2000.json b/data/tests/tinshift_simplified_n60_n2000.json
new file mode 100644
index 00000000..f6d3d4aa
--- /dev/null
+++ b/data/tests/tinshift_simplified_n60_n2000.json
@@ -0,0 +1,50 @@
+{
+  "file_type": "triangulation_file",
+  "format_version": "1.0",
+  "name": "Name",
+  "version": "Version",
+  "publication_date": "2018-07-01T00:00:00Z",
+  "license": "Creative Commons Attribution 4.0 International",
+  "description": "Test triangulation",
+  "authority": {
+    "name": "Authority name",
+    "url": "http://example.com",
+    "address": "Adress",
+    "email": "test@example.com"
+  },
+  "links": [
+    {
+      "href": "https://example.com/about.html",
+      "rel": "about",
+      "type": "text/html",
+      "title": "About"
+    },
+    {
+      "href": "https://example.com/download",
+      "rel": "source",
+      "type": "application/zip",
+      "title": "Authoritative source"
+    },
+    {
+      "href": "https://creativecommons.org/licenses/by/4.0/",
+      "rel": "license",
+      "type": "text/html",
+      "title": "Creative Commons Attribution 4.0 International license"
+    },
+    {
+      "href": "https://example.com/metadata.xml",
+      "rel": "metadata",
+      "type": "application/xml",
+      "title": " ISO 19115 XML encoded metadata regarding the tirangulation"
+    }
+  ],
+  "input_crs": "EPSG:2393+5717",
+  "output_crs": "EPSG:2393+5941",
+  "transformed_components": [ "vertical" ],
+  "vertices_columns": [ "source_x", "source_y", "source_z", "target_z" ],
+  "triangles_columns": [ "idx_vertex1", "idx_vertex2", "idx_vertex3" ],
+  "vertices": [ [3188607.0, 6688748.0, 23.123, 23.4133],
+                [3184981.0, 6725255.0, 8.044, 8.34499],
+                [3220912.0, 6699508.0, 1.724, 2.0101] ],
+  "triangles": [ [0, 1, 2] ]
+}