From 845f700335fb31318acf831bc42d62a230478eae Mon Sep 17 00:00:00 2001 From: Martin Dobias Date: Sun, 23 Feb 2020 21:46:47 +0100 Subject: Add alternative grid for JTSK - JTSK03 transform (EPSG:8364) The definition of EPSG:8364 uses NADCON method for horizontal grid (.las/.los files) but this format is not supported by PROJ. UGKK (Slovak Geodetic and Cartographic Institute) provides NADCON .las/.los files here: https://www.geoportal.sk/files/gz/slovakia_jtsk03_to_jtsk.zip Additionally UGKK also provides the same grid file in NTv2 format: https://www.geoportal.sk/files/gz/slovakia_jtsk03_to_jtsk_ntv2.zip So let's add the NTv2 file the grid_alternatives table so that PROJ can automatically pick it up... --- data/sql/grid_alternatives.sql | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'data/sql/grid_alternatives.sql') diff --git a/data/sql/grid_alternatives.sql b/data/sql/grid_alternatives.sql index b9c2e323..e545c7bf 100644 --- a/data/sql/grid_alternatives.sql +++ b/data/sql/grid_alternatives.sql @@ -176,6 +176,14 @@ VALUES ('Icegeoid_ISN2016.gtx','is_lmi_Icegeoid_ISN2016.tif','Icegeoid_ISN2016.gtx','GTiff','geoid_like',0,NULL,'https://cdn.proj.org/is_lmi_Icegeoid_ISN2016.tif',1,1,NULL), -- New Zealand grid shift models. ('auckland-1946-to-nzvd2016-conversion.csv','nz_linz_auckht1946-nzvd2016.tif','auckht1946-nzvd2016.gtx','GTiff','vgridshift',0,NULL,'https://cdn.proj.org/nz_linz_auckht1946-nzvd2016.tif',1,1,NULL), +-- Slovakia +-- +-- The definition of EPSG:8364 (JTSK03 to JTSK) uses NADCON method which is not supported by PROJ. +-- UGKK (Slovak Geodetic and Cartographic Institute) provides also NTv2 grid file in addition +-- to NADCON .las/.los files, so we define the NTv2 file here as an alternative. +-- The file is available online but it does not have a confirmed open license yet, +-- so it is not available in proj-datumgrid-europe for now +('Slovakia_JTSK03_to_JTSK.LAS', 'Slovakia_JTSK03_to_JTSK.gsb', 'Slovakia_JTSK03_to_JTSK.gsb', 'NTv2', 'hgridshift', 0, NULL, 'https://www.geoportal.sk/files/gz/slovakia_jtsk03_to_jtsk_ntv2.zip', 0, 0, NULL), -- Superseded entries ('bluff-1955-to-nzvd2016-conversion.csv','nz_linz_blufht1955-nzvd2016.tif','blufht1955-nzvd2016.gtx','GTiff','vgridshift',0,NULL,'https://cdn.proj.org/nz_linz_blufht1955-nzvd2016.tif',1,1,NULL), ('dunedin-1958-to-nzvd2016-conversion.csv','nz_linz_duneht1958-nzvd2016.tif','duneht1958-nzvd2016.gtx','GTiff','vgridshift',0,NULL,'https://cdn.proj.org/nz_linz_duneht1958-nzvd2016.tif',1,1,NULL), -- cgit v1.2.3