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https://github.com/OSGeo/PROJ/pull/1790#discussion_r363748615)
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opened
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https://github.com/OSGeo/PROJ/pull/1777
- Move content of legacy apply_gridshift.cpp and apply_vgridshift.cpp in grids.cpp
- Rename nad_ functions to pj_hgrid_
- Rename internal proj_hgrid_/proj_vgrid_ functions to pj_
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which is the official name in EPSG
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This option is to load grid(s) that have both the horizontal and
vertical velocities in the same file.
Can be tested with the following grid
https://github.com/rouault/sample_proj_gtiff_grids/blob/master/nkgrf03vel_realigned.tif
converted from the original .ct2 and .gtx with
```
gdal_translate nkgrf03vel_realigned.vrt nkgrf03vel_realigned.tif -co COMPRESS=DEFLATE -co PREDICTOR=3 -co BLOCKYSIZE=241 -co INTERLEAVE=BAND
```
where nkgrf03vel_realigned.vrt is
```
<VRTDataset rasterXSize="223" rasterYSize="241">
<SRS dataAxisToSRSAxisMapping="2,1">GEOGCRS["Unknown based on GRS80",
DATUM["Unknown based on GRS80",
ELLIPSOID["GRS 1980",6378137,298.257222101,
LENGTHUNIT["metre",1]]],
PRIMEM["Greenwich",0,
ANGLEUNIT["degree",0.0174532925199433]],
CS[ellipsoidal,2],
AXIS["geodetic latitude (Lat)",north,
ORDER[1],
ANGLEUNIT["degree",0.0174532925199433]],
AXIS["geodetic longitude (Lon)",east,
ORDER[2],
ANGLEUNIT["degree",0.0174532925199433]]]
</SRS>
<GeoTransform> 2.9166666666666670e+00, 1.6666666666666666e-01, 0.0000000000000000e+00, 7.3041666666666686e+01, 0.0000000000000000e+00, -8.3333333333333329e-02</GeoTransform>
<Metadata>
<MDI key="DESCRIPTION"></MDI>
<MDI key="area_of_use">Nordic and Baltic countries</MDI>
<MDI key="AREA_OR_POINT">Point</MDI>
<MDI key="TIFFTAG_COPYRIGHT">The Nordic Geodetic Commission. Creative Commons Attribution 4.0 https://creativecommons.org/licenses/by/4.0/</MDI>
<MDI key="TIFFTAG_DATETIME">2019:12:30 00:00:00</MDI>
<MDI key="TIFFTAG_IMAGEDESCRIPTION">Deformation model covering the Nordic and Baltic countries. Used in transformations between global reference frames and the local realisations of ETRS89 in the Nordic and Baltic countries</MDI>
<MDI key="TYPE">VELOCITY</MDI>
</Metadata>
<VRTRasterBand dataType="Float32" band="1">
<Description>east_velocity</Description>
<UnitType>mm/year</UnitType>
<SimpleSource>
<SourceFilename relativeToVRT="0">/home/even/proj/proj-datumgrid/europe/nkgrf03vel_realigned_xy.ct2</SourceFilename>
<SourceBand>2</SourceBand> <!-- GDAL exposes the first physical component of the file (longitude offset normally, here east velocity) as the second band -->
<SrcRect xOff="0" yOff="0" xSize="223" ySize="241" />
<DstRect xOff="0" yOff="0" xSize="223" ySize="241" />
</SimpleSource>
</VRTRasterBand>
<VRTRasterBand dataType="Float32" band="2">
<Description>north_velocity</Description>
<UnitType>mm/year</UnitType>
<SimpleSource>
<SourceFilename relativeToVRT="0">/home/even/proj/proj-datumgrid/europe/nkgrf03vel_realigned_xy.ct2</SourceFilename>
<SourceBand>1</SourceBand> <!-- and the second physical component (latitude offset normally, here north velocity) as the first band -->
<SrcRect xOff="0" yOff="0" xSize="223" ySize="241" />
<DstRect xOff="0" yOff="0" xSize="223" ySize="241" />
</SimpleSource>
</VRTRasterBand>
<VRTRasterBand dataType="Float32" band="3">
<Description>up_velocity</Description>
<UnitType>mm/year</UnitType>
<SimpleSource>
<SourceFilename relativeToVRT="0">/home/even/proj/proj-datumgrid/europe/nkgrf03vel_realigned_z.gtx</SourceFilename>
<SourceBand>1</SourceBand>
<SrcRect xOff="0" yOff="0" xSize="223" ySize="241" />
<DstRect xOff="0" yOff="0" xSize="223" ySize="241" />
</SimpleSource>
</VRTRasterBand>
</VRTDataset>
```
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and networking enabled
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- unitconvert, ell_set and helmert were using debug level, which is
too verbose. Using trace instead
- proj_trans() was using trace to indicate the operation it selects.
Changing it to debug
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Used for French NTF to RGF93 transformation using gr3df97a.tif grid
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hgridshift/vgridshift/deformation structures
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HEAD/1.90dev happy (fixes #1648)
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Remove unneeded C99 compatibility functions from math.cpp and proj_math.h
I'll do the clean up of the -std=c89 flags etc. as a separate pull request.
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needs <limits.h>. Update scripts/reference_exported_symbols.txt and
src/proj_symbol_rename.h.
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https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16106
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Introduced by "Merge projects.h into proj_internal.h" 8ab6f68.
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Introduced by "Merge projects.h into proj_internal.h" 8ab6f683.
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Various ossfuzz fixes
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By mistake the second eccentricity was used in a few places in the
Molodensky transform. According to the literature the first eccentricity
should always be used in the eccentricity.
This only affects the output slightly. Reported test coordinates
differed by less than a millimeter.
Fixes #1321
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Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=11893
Credit to OSS Fuzz
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Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=13069
Credit to OSS Fuzz
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values in the grids with US VERTCON grids that are in millimeters
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The +t_obs parameter was confusing for users since it effectively
overwrote the observation time in input coordinates. To make it more clear
what is the operation is doing, users are now required to directly specify
the time span for which they wish to apply a given deformation. The parameter
+dt has been added for that purpose. The new parameter is mutually
exclusive with +t_epoch. +dt is used when deformation
for a set amount of time is needed and +t_epoch is used (in
conjunction with the observation time of the input coordinate) when
deformation from a specific epoch to the observation time is needed.
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Changed the direction of dt-calculation to follow the same convention as
helmert. Changed from dt = t_c - t_obs to dt = t_obs - t_c, which
effectively reverses the direction of the operation. Existing projstrings
using deformation can simply reverse the direction of the operation to
achieve the same results as before this commit.
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This communicates better what the unit actually is. It also opens the
door for potentially adding PJ_IO_UNITS_DEGREES in the future in order
to coordinates in degrees correctly as well.
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structures
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projections/ transformations/ tests/ subdirectories
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