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| author | Even Rouault <even.rouault@spatialys.com> | 2019-12-16 20:27:09 +0100 |
|---|---|---|
| committer | Even Rouault <even.rouault@spatialys.com> | 2019-12-16 20:27:09 +0100 |
| commit | 204ed7ff3ee4462bf4c0ffa327683bcaabe13eff (patch) | |
| tree | 06bfee8273236655eb65373e966c38dcfd6d1bbe /pt_dgt | |
| parent | 9550eef8af6001ebdce4fe1a1f58a981bba45444 (diff) | |
| download | PROJ-data-204ed7ff3ee4462bf4c0ffa327683bcaabe13eff.tar.gz PROJ-data-204ed7ff3ee4462bf4c0ffa327683bcaabe13eff.zip | |
Add README files
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| l--------- | pt_dgt/.github/README.md | 1 | ||||
| -rw-r--r-- | pt_dgt/README.pt_dgt | 36 |
2 files changed, 37 insertions, 0 deletions
diff --git a/pt_dgt/.github/README.md b/pt_dgt/.github/README.md new file mode 120000 index 0000000..ae947f6 --- /dev/null +++ b/pt_dgt/.github/README.md @@ -0,0 +1 @@ +../README.pt_dgt
\ No newline at end of file diff --git a/pt_dgt/README.pt_dgt b/pt_dgt/README.pt_dgt new file mode 100644 index 0000000..c5ac092 --- /dev/null +++ b/pt_dgt/README.pt_dgt @@ -0,0 +1,36 @@ +# README.pt_dgt + +The files in this section result from the conversion of datasets originating +from [DG Territorio](http://www.dgterritorio.pt/) + +## Included grids + +### Portugal: Lisbon Datum -> ETRS89 + +Grid transformation from Portuguese Lisbon Datum to ETRS89 in Portugal. + +*Source*: [DGT](http://www.dgterritorio.pt/cartografia_e_geodesia/geodesia/transformacao_de_coordenadas/grelhas_em_ntv2/) +*Format*: GeoTIFF converted from NTv2 +*License*: [Creative Commons Attribution 4.0](http://creativecommons.org/licenses/by/4.0/) +*Credit*: (c)2019 Directorate-General for the Territorial Development. + +Derived from 1129 common stations in the national geodetic network. +Residuals at 130 further test points average 0.09m, maximum 0.30m. +Recommended to transform from Portuguese Lisbon Datum (EPSG:20790) to ETRS89 in Portugal (EPSG:3763). + +* DLx_ETRS89_geo.tif + +### Portugal: Datum 73 -> ETRS89 + +Grid transformation from Portuguese Datum 73 to ETRS89 in Portugal. + +*Source*: [DGT](http://www.dgterritorio.pt/cartografia_e_geodesia/geodesia/transformacao_de_coordenadas/grelhas_em_ntv2/) +*Format*: GeoTIFF converted from NTv2 +*License*: [Creative Commons Attribution 4.0](http://creativecommons.org/licenses/by/4.0/) +*Credit*: (c)2019 Directorate-General for the Territorial Development. + +Derived from 1129 common stations in the national geodetic network. +Residuals at 130 further test points average 0.06m, maximum 0.16m. +Recommended to transform from Portuguese Datum 73 (EPSG:27493) to ETRS89 in Portugal (EPSG:3763). + +* D73_ETRS89_geo.tif |