Hi,
no the GDAL raster driver has no support for the UGRIB convention. You
could likely use the multidimensional API
(https://gdal.org/user/multidim_raster_data_model.html) and tools to
access such files at a lower level, but you'd probably be better uses
MDAL which has apparently a UGRIB reader:
https://www.mdal.xyz/drivers/ugrid.html and should be able to expose meshes.
Even
Le 08/09/2021 à 22:21, Laframboise,Felix (ECCC) a écrit :
Hi,
I am currently using GDAL 3.1.3 on a Ubuntu machine. I am trying to
work with NetCDF files using the UGRID convention (described here:
https://ugrid-conventions.github.io/ugrid-conventions/
<https://ugrid-conventions.github.io/ugrid-conventions/>).
I am having difficulty working with this kind of NetCDF file. Here is
the output of `gdalinfo` against one subdataset of a NetCDF file
using the UGRID convention.
`$ gdalinfo -mm -proj4
NETCDF:"PATH_TO_NETCDF/CMC_shop_slfeav200n_surface_sfc_0_2019080706_P040.nc":St_Lawrence_River_face_nodes
Warning 1: No UNIDATA NC_GLOBAL:Conventions attribute
Driver: netCDF/Network Common Data Format
Files: PATH_TO_NETCDF/CMC_shop_slfeav200n_surface_sfc_0_2019080706_P040.nc
Size is 3, 87396
Metadata:
St_Lawrence_River_face_nodes#cf_role=face_node_connectivity
St_Lawrence_River_face_nodes#long_name=Maps every triangular face to
its three corner nodes.
St_Lawrence_River_face_nodes#start_index=0
Corner Coordinates:
Upper Left ( 0.0, 0.0)
Lower Left ( 0.0,87396.0)
Upper Right ( 3.0, 0.0)
Lower Right ( 3.0,87396.0)
Center ( 1.5,43698.0)
Band 1 Block=3x1 Type=Int32, ColorInterp=Undefined
Computed Min/Max=0.000,53331.000
NoData Value=-2147483647
Metadata:
cf_role=face_node_connectivity
long_name=Maps every triangular face to its three corner nodes.
NETCDF_VARNAME=St_Lawrence_River_face_nodes
start_index=0
`
Following this output, I can confirm that the size and the extent
(Corner Coordinates) are not right for example.
Is there anyone who has worked with NetCDF files using the UGRID
convention? Is GDAL capable of handling or manipulating this kind of
NetCDF file?
Thanks a lot in advance for your answer(s)!
Félix Laframboise
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