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| author | Even Rouault <even.rouault@spatialys.com> | 2020-01-20 15:01:33 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-01-20 15:01:33 +0100 |
| commit | a6390b59ae2bad2a763e7ab3341ee4c80e708b3d (patch) | |
| tree | 26d5016def90e3e9f71a51da694ff3028e1006ed /docs/source/operations/transformations/xyzgridshift.rst | |
| parent | f1209ff020cc9f5490f8e6c7edced6877f53da49 (diff) | |
| parent | 90b6685a990b8c4931aafb508853401a89163e78 (diff) | |
| download | PROJ-a6390b59ae2bad2a763e7ab3341ee4c80e708b3d.tar.gz PROJ-a6390b59ae2bad2a763e7ab3341ee4c80e708b3d.zip | |
Merge pull request #1826 from rouault/rfc4_code_review
[RFC4_dev] Address code review comments
Diffstat (limited to 'docs/source/operations/transformations/xyzgridshift.rst')
| -rw-r--r-- | docs/source/operations/transformations/xyzgridshift.rst | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/docs/source/operations/transformations/xyzgridshift.rst b/docs/source/operations/transformations/xyzgridshift.rst index c49b7592..30537032 100644 --- a/docs/source/operations/transformations/xyzgridshift.rst +++ b/docs/source/operations/transformations/xyzgridshift.rst @@ -21,16 +21,16 @@ translation values from a grid. The grid is referenced against either the 2D geographic CRS corresponding to the input (or sometimes output) CRS. This method is described (in French) in :cite:`NTF_88` -and as EPSG operation methode code 9655 in :cite:`IOGP2018` (§2.4.4.1.1 +and as EPSG operation method code 9655 in :cite:`IOGP2018` (§2.4.4.1.1 France geocentric interpolation). The translation in the grids are added to the input coordinates in the forward direction, and subtracted in the reverse direction. -By default (if grid_ref=input_crs), in the forward direction, the input coordinates +By default (if ``grid_ref=input_crs``), in the forward direction, the input coordinates are converted to their geographic equivalent to directly read and interpolate from the grid. In the reverse direction, an iterative method is used to be able to find the grid locations to read. -If grid_ref=output_crs is used, then the reverse strategy is applied: iterative +If ``grid_ref=output_crs`` is used, then the reverse strategy is applied: iterative method in the forward direction, and direct read in the reverse direction. Example @@ -62,7 +62,7 @@ Required .. option:: +grids=<list> - Comma-separated list of grids to load. If a grid is prefixed by an `@` the + Comma-separated list of grids to load. If a grid is prefixed by an ``@`` the grid is considered optional and PROJ will the not complain if the grid is not available. |