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| author | Even Rouault <even.rouault@spatialys.com> | 2019-12-14 00:16:14 +0100 |
|---|---|---|
| committer | Even Rouault <even.rouault@spatialys.com> | 2019-12-14 00:16:17 +0100 |
| commit | f36d2374268608d276da45c96a7b4792ab8ffdb5 (patch) | |
| tree | a66a3e3d062e23a91c61e1a31671866b9a94cfd8 /docs/source/development/reference/cpp/util.rst | |
| parent | b934fd3885fa017b0c7a5ca59083a7f52fdaafc0 (diff) | |
| download | PROJ-f36d2374268608d276da45c96a7b4792ab8ffdb5.tar.gz PROJ-f36d2374268608d276da45c96a7b4792ab8ffdb5.zip | |
Horizontal grid shift: fix issue on iterative inverse computation when switching between (sub)grids (fixes #1663)
Given in.txt with
53.999759140 5.144478208 252.6995
Before the fix,
cct -t 0 -d 4 +proj=pipeline +step +proj=axisswap +order=2,1,3,4 +step +proj=hgridshift +inv +grids=rdtrans2018.gsb +step +proj=vgridshift +grids=naptrans2018.gtx +step +proj=sterea +lat_0=52.156160556 +lon_0=5.387638889 +k=0.9999079 +x_0=155000 +y_0=463000 +ellps=bessel in.txt
returned:
139079.8814 668306.0302 212.1724 0.0000
It now returns:
139079.8850 668306.0458 212.1724 0.0000
which meets with the 1mm accuracy the expected result of test point
```
30010049 53.999759140 5.144478208 252.6995 139079.8850 668306.0460 212.1723
```
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