edfialk wrote:
Hello, I'm fairly new to reprojection and my experience with gdal is limited,
so I'll do my best to keep up. I have tried searching through a number of
messages without finding anything quite like my problem.
I've been completely unsuccessful trying to reproject a netcdf file for some
time now and I'm becoming fairly desperate for some help. I'm going for
changing "Lambert Conformal with a perfect sphere geoid with earth
radius=6370km centered at 40N, 97W with standard latitudes at 33N, 45N to
geographic lat, long (flat) projection."
First, a little gdal info on one particular subdataset for the netcdf file:
Warning 1: No UNIDATA NC_GLOBAL:Conventions attribute
Driver: netCDF/Network Common Data Format
Size is 148, 112
Coordinate System is `'
...
ad then coordinates, cdate, ctime, xcent, ycent, etc. etc. I was wondering
if NC_Global or the coordinate system being `' might cause a problem.
and then, running the command (going to mercator just to get a successful
reprojection, I'll deal with lat/lon later):
gdalwarp -s_srs "+proj=lcc" -t_srs "+proj=merc" NETCDF:"test_0910.nc":PM25
NETCDF:"test_out.nc":PM25
gives me:
Warning 1: No UNIDATA NC_GLOBAL:Conventions attribute
ERROR 1: Unable to compute a transformation between pixel/line
and georeferenced coordinates for NETCDF:test_0910.nc:PM25.
There is no affine transformation and no GCPs.
You can try the GMT program grdproject but I warn you already that it might not
be obvious.
Also you can try my front end to grdproject in Mirone. It should be easier but
again there will
probably be fine details that one need to adjust.
Joaquim Luis
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