Description of the desired feature
This is a feature request to add a method for getting the projected coordinate reference system (CRS) from a GMT_GRID (#2398)/GMT_IMAGE (#3338)/GMT_CUBE (#3150) struct when parsing a NetCDF/GeoTIFF file. Motivation from #2235 (comment):
In GMT_IMAGE.to_dataarray(), perhaps we should parse the header->ProjRefPROJ4 and set the correct CRS to the 3-band xarray.DataArray. ...
Yeah, I was thinking of parsing the projection information from the header when you mentioned this ProjRefPROJ4 field at #3128 (comment). But ideally we'll need to handle PROJ4/WKT/EPSG:
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# Referencing system string in PROJ.4 format |
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("ProjRefPROJ4", ctp.c_char_p), |
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# Referencing system string in WKT format |
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("ProjRefWKT", ctp.c_char_p), |
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# Referencing system EPSG code |
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("ProjRefEPSG", ctp.c_int), |
...
Implementation details
Use pyproj.CRS.from_string to make a CRS from PROJ4/WKT/EPSG. Create a new method/property under _GMT_GRID_HEADER at https://github.com/GenericMappingTools/pygmt/blob/v0.13.0/pygmt/datatypes/header.py#L67
We can also consider exposing a .gmt.proj or .gmt.crs xarray accessor property (xref #499). But note that there is some discussion at geoxarray/geoxarray#21 on whether there should be a common .crs accessor in some xarray library that can be used across rioxarray/geoxarray/odc-geo/etc.
Are you willing to help implement and maintain this feature?
Yes
Description of the desired feature
This is a feature request to add a method for getting the projected coordinate reference system (CRS) from a GMT_GRID (#2398)/GMT_IMAGE (#3338)/GMT_CUBE (#3150) struct when parsing a NetCDF/GeoTIFF file. Motivation from #2235 (comment):
Implementation details
Use
pyproj.CRS.from_stringto make a CRS from PROJ4/WKT/EPSG. Create a new method/property under_GMT_GRID_HEADERat https://github.com/GenericMappingTools/pygmt/blob/v0.13.0/pygmt/datatypes/header.py#L67We can also consider exposing a
.gmt.projor.gmt.crsxarray accessor property (xref #499). But note that there is some discussion at geoxarray/geoxarray#21 on whether there should be a common.crsaccessor in some xarray library that can be used across rioxarray/geoxarray/odc-geo/etc.Are you willing to help implement and maintain this feature?
Yes