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Diffstat (limited to 'docs/source/grids.rst')
| -rw-r--r-- | docs/source/grids.rst | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/docs/source/grids.rst b/docs/source/grids.rst index 99bcfdc1..4c0bc577 100644 --- a/docs/source/grids.rst +++ b/docs/source/grids.rst @@ -11,6 +11,11 @@ Grids Grid files are important for shifting and transforming between datums +PROJ supports CTable2, NTv1 and NTv2 files for horizontal grid corrections and +the GTX file format for vertical corrections. Details about the formats can be +found in the GDAL documentation. GDAL reads and writes all formats. Using GDAL +for construction of new grids is recommended. + US, Canadian, French and New Zealand -------------------------------------------------------------------------------- @@ -86,6 +91,8 @@ Hungary `Hungarian grid <https://github.com/OSGeoLabBp/eov2etrs/>`__ ETRS89 - HD72/EOV (epsg:23700), both horizontal and elevation grids +.. _nonfreegrids: + Non-Free Grids -------------------------------------------------------------------------------- @@ -166,6 +173,3 @@ Netherlands ................................................................................ `Dutch grid <https://www.kadaster.nl/web/Themas/Registraties/Rijksdriehoeksmeting/Transformatie-van-coordinaten.htm>`__ (Registration required before download) - - - |