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| author | Andrew Bell <andrew.bell.ia@gmail.com> | 2019-05-15 10:47:03 -0400 |
|---|---|---|
| committer | Andrew Bell <andrew.bell.ia@gmail.com> | 2019-05-15 10:47:03 -0400 |
| commit | 8f268409d37cea329d263e177b83e42f8384d3c7 (patch) | |
| tree | c4d0f3dd19456600f718a6e0c8573577f433549b /docs/source/operations/transformations | |
| parent | 886ced02f0aaab5d66d16459435f7447cf976650 (diff) | |
| parent | d67203a6f76a74f5ac029ff052dbcc72e3b59624 (diff) | |
| download | PROJ-8f268409d37cea329d263e177b83e42f8384d3c7.tar.gz PROJ-8f268409d37cea329d263e177b83e42f8384d3c7.zip | |
Merge remote-tracking branch 'origin/master'
Diffstat (limited to 'docs/source/operations/transformations')
| -rw-r--r-- | docs/source/operations/transformations/geogoffset.rst | 4 | ||||
| -rw-r--r-- | docs/source/operations/transformations/horner.rst | 2 | ||||
| -rw-r--r-- | docs/source/operations/transformations/vgridshift.rst | 4 |
3 files changed, 5 insertions, 5 deletions
diff --git a/docs/source/operations/transformations/geogoffset.rst b/docs/source/operations/transformations/geogoffset.rst index f643485e..6ca4f64c 100644 --- a/docs/source/operations/transformations/geogoffset.rst +++ b/docs/source/operations/transformations/geogoffset.rst @@ -21,11 +21,11 @@ latitude coordinates, and an offset to the ellipsoidal height. This method is normally only used when low accuracy is tolerated. It is documented as coordinate operation method code 9619 (for geographic 2D) and 9660 (for -geographic 3D) in the EPSG dataset (:cite:`EPSGGuidanceNumber7Part2`) +geographic 3D) in the EPSG dataset (:cite:`IOGP2018`) It can also be used to implement the method Geographic2D with Height Offsets (code 9618) by noting that the input vertical component is a gravity-related -height and the output vertical component is the ellispoid height (dh being +height and the output vertical component is the ellipsoid height (dh being the geoid undulation). It can also be used to implement the method Vertical offset (code 9616) diff --git a/docs/source/operations/transformations/horner.rst b/docs/source/operations/transformations/horner.rst index dd9b9cc9..5c88c292 100644 --- a/docs/source/operations/transformations/horner.rst +++ b/docs/source/operations/transformations/horner.rst @@ -28,7 +28,7 @@ space used. PROJ implements two versions of the Horner evaluation scheme: Real and complex polynomial evaluation. Below both are briefly described. For more details consult -:cite:`Ruffhead2016` and :cite:`EPSGGuidanceNumber7Part2`. +:cite:`Ruffhead2016` and :cite:`IOGP2018`. The polynomial evaluation in real number space is defined by the following equations: diff --git a/docs/source/operations/transformations/vgridshift.rst b/docs/source/operations/transformations/vgridshift.rst index 484ad4bf..04be5b1b 100644 --- a/docs/source/operations/transformations/vgridshift.rst +++ b/docs/source/operations/transformations/vgridshift.rst @@ -23,7 +23,7 @@ a specific amount determined by the loaded grids. The simplest use case of the horizontal grid shift is applying a single grid. Here we change the vertical reference from the ellipsoid to the global geoid model, EGM96:: - +proj=vgridshift +grids=egm96_16.gtx + +proj=vgridshift +grids=egm96_15.gtx More than one grid can be loaded at the same time, for instance in the case where @@ -31,7 +31,7 @@ a better geoid model than the global is available for a certain area. Here the gridshift is set up so that the local DVR90 geoid model takes precedence over the global model:: - +proj=vgridshift +grids=@dvr90.gtx,egm96_16.gtx + +proj=vgridshift +grids=@dvr90.gtx,egm96_15.gtx The ``@`` in the above example states that the grid is optional, in case the grid is not found in the PROJ search path. The list of grids is prioritized so that |