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diff --git a/README.DATUMGRID b/README.DATUMGRID new file mode 100644 index 0000000..d40cfdc --- /dev/null +++ b/README.DATUMGRID @@ -0,0 +1,62 @@ +# PROJ-DATUMGRID-GEOTIFF + +The files in this package are in cloud-optimized GeoTIFF format and can be +unpacked in the PROJ data directory of PROJ 7 or later. +For an installed PROJ this may be /usr/local/share/proj or /usr/share/proj +on unix style operating systems. + +## About the Datum Grid package + +The datum grid package for PROJ is maintained on the OSGeo proj-datumgrid-geotiff +repository on [GitHub](https://github.com/OSGeo/proj-datumgrid-geotiff). + +It contains shift grids for horizontal and vertical coordinate transformations. + +All grids in the package are released under +permissive licenses. New grids are accepted into the package as long as +they are released under a license that is compatible with the [Open Source +Definition](https://opensource.org/osd-annotated) and the source of the grid +is clearly stated and verifiable. Suitable licenses include: + + * Public domain + * X/MIT + * BSD 2/3/4 clause + * CC0 + * CC-BY (v3.0 or later) + * CC-BY-SA (v3.0 or later) + +Consult [CONTRIBUTING.md](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/CONTRIBUTING.md) to submit a new grid. + +## Cloud usage + +Those grids can be retrieved from cloud storage (AWS Public datasets) as +described in +https://github.com/rouault/PROJ/blob/rfc4_remote_and_geotiff_grid/docs/source/community/rfc/rfc-4.rst#network-access-to-grids + +## Content + +All grid files should be put in a flat way in the PROJ data directory. They +will be also organized in a flat way on cdn.proj.org. + +However for clarity of this repository, we have organized them by producer / agency. +Each file is in a subdirectory whose name follows {country_code}_{agency_name}. +For example us_noaa for files originating from US NOAA. + +[at_bev: Austria BEV](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/at_bev/README.at_bev) +[au_geoau: Australia Geosciences Australia](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/au_geoau/README.au_geoau) +[au_icsm: Australia ICSM](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/au_icsm/README.au_icsm) +[be_ign: Belgium IGN](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/be_ign/README.be_ign) +[ca_nrc: Canada NRC](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/ca_nrc/README.ca_nrc) +[ch_swisstopo: Switzerland Swissstopo](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/ch_swisstopo/README.ch_swisstopo) +[de_bkg: Germany BKG](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/de_bkg/README.de_bkg) +[de_geogsn: Germany GeoSN](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/de_geogsn/README.de_geogsn) +[de_lgl: Germany LGL](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/de_lgl/README.de_lgl) +[dk_sdfe: Denmark SDFE](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/dk_sdfe/README.dk_sdfe) +[fr_ign: France IGN](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/fr_ign/README.fr_ign) +[nz_linz: New Zealand LINZ](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/nz_linz/README.nz_linz) +[pt_dgt: Portugal DGT](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/pt_dgt/README.pt_dgt) +[se_lantmateriet: Sweden Lantmateriet](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/se_lantmateriet/README.se_lantmateriet) +[uk_os: UK OS](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/uk_os/README.uk_os) +[us_nga: USA NGA](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/us_nga/README.us_nga) +[us_noaa: USA NOAA](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/us_noaa/README.us_noaa) +[us_usgs: USA USGS](https://github.com/OSGeo/proj-datumgrid-geotiff/blob/master/us_usgs/README.us_usgs) |