From 0e51328d89563c2968a33e816bfd4424d2437a7e Mon Sep 17 00:00:00 2001 From: Kristian Evers Date: Mon, 22 Jan 2018 14:21:25 +0100 Subject: Add details about grid file formats in relevant sections of the documentation [skip ci] --- docs/source/usage/operations/transformations/hgridshift.rst | 3 +++ docs/source/usage/operations/transformations/vgridshift.rst | 3 +++ 2 files changed, 6 insertions(+) (limited to 'docs/source/usage') diff --git a/docs/source/usage/operations/transformations/hgridshift.rst b/docs/source/usage/operations/transformations/hgridshift.rst index bd147c2f..a9690260 100644 --- a/docs/source/usage/operations/transformations/hgridshift.rst +++ b/docs/source/usage/operations/transformations/hgridshift.rst @@ -34,3 +34,6 @@ is not found in the PROJ.4 search path. The list of grids is prioritized so that grids in the start of the list takes presedence over the grids in the back of the list. +PROJ supports CTable2, NTv1 and NTv2 files for horizontal grid corrections. Details +about all three formats can be found in the GDAL documentation. GDAL reads and +writes all three formats. Using GDAL for construction of new grids is recommended. diff --git a/docs/source/usage/operations/transformations/vgridshift.rst b/docs/source/usage/operations/transformations/vgridshift.rst index 272b24ab..31b3e56e 100644 --- a/docs/source/usage/operations/transformations/vgridshift.rst +++ b/docs/source/usage/operations/transformations/vgridshift.rst @@ -36,3 +36,6 @@ is not found in the PROJ.4 search path. The list of grids is prioritized so that grids in the start of the list takes presedence over the grids in the back of the list. +PROJ supports the GTX file format for vertical grid corrections. Details +about all the format can be found in the GDAL documentation. GDAL both reads and +writes the format. Using GDAL for construction of new grids is recommended. -- cgit v1.2.3