Hi, I downloaded NTV2_0.GSB grid file from the Canadian Government site[1]. It is used in the transformations EPSG:1313 NAD27 to NAD83 (4) and EPSG:1693 NAD27 to WGS 84 (33). When I try to use either transform, I get the following in the console: Dec 03, 2021 1:38:43 PM org.apache.sis.internal.referencing.provider.NTv2 createMathTransform WARNING: Loading of "NTv2_0.gsb" done, but some records were ignored because of unrecognized keywords: DATUM_F, DATUM_T NAD27 input: (51.325795, -115.15383774, NaN) Transform EPSG:1313 NAD83 result: (51.325853158412635, -115.15382696154606, NaN) Transform EPSG:1693 WGS84 result: (51.325853158412635, -115.15382696154606, NaN) Expected result From Canada NTv2 webapp: (51.325841, -115.15486299, NaN)
The expected result is from https://webapp.geod.nrcan.gc.ca/geod/tools-outils/ntv2.php?locale=en. Is there anything that can be done or do I just have to avoid these transforms? [1]: https://webapp.geod.nrcan.gc.ca/geod/data-donnees/transformations.php Thanks, Daniel
