Store projection properties in the .xml file

[vic1309]

Dear all

I would like to know if there is a way to store projection properties, or proj4, in the .xml file. I can see that the projection itself is saved, but not its metadata.

Cheers,
Victor

[clstoulouse]

Hi @vic1309 ,

Thank for your interest in Motu :-)
"projection" : is it about the projection of the downloaded file ? or about the netcdf file storage ?
Could you specify an example of what you would like to get, an example of metadata you would like to get ?

Regards.

[vic1309]

Thank you for the great job!!

Is it about the projection of the downloaded file. For instance, I'm interested in the service ARCTIC_ANALYSISFORECAST_PHY_ICE_002_011-TDS, product cmems_mod_arc_phy_anfc_nextsim_hm. When I download the .nc file of this dataset, I can see that it contains the variable stereographic and such a variable contains the following attributes:

latitude_of_projection_origin:          90.0
longitude_of_projection_origin:         -45.0
straight_vertical_longitude_from_pole:  -45.0
semi_major_axis:                        6378273.0
semi_minor_axis:                        6378273.0
scale_factor_at_projection_origin:      1.0
grid_mapping_name:                      polar_stereographic
false_northing:                         0.0
false_easting:                          0.0
proj4:                                  +proj=stere +lat_0=90 +lat_ts=90 ...
_CoordinateTransformType:               Projection
_CoordinateAxisTypes:                   GeoX GeoY

I would like to know if there is a way to save these attributes in the .xml file.

Cheers,
Vic

[clstoulouse]

Two interfaces exist in order to get metadata as XML, e.g. :
http://nrt.cmems-du.eu/motu-web/Motu?action=describeproduct&service=ARCTIC_ANALYSISFORECAST_PHY_ICE_002_011-TDS&product=cmems_mod_arc_phy_anfc_nextsim_hm
or
http://nrt.cmems-du.eu/motu-web/Motu?action=describecoverage&service=ARCTIC_ANALYSISFORECAST_PHY_ICE_002_011-TDS&datasetID=cmems_mod_arc_phy_anfc_nextsim_hm

But all metadata you refers to is not available.
If this metadata is required for you, best way is to open an request for change on https://resources.marine.copernicus.eu/

Regards