Hi Stephane,
th polar_stereographic variable should have an attribute:
polar_stereographic:grid_mapping_name = polar_stereographic
the projected data variables (alsi?) should have the attributes linking
to above variable:
alsi:grid_mapping = polar_stereographic
and to the actual coordinates lat and lon.
alsi:coordinates = "lat lon"
alsi should not have the grid_mapping_name attribute.
I hope this is all. I don't understand the
hemisphere_of_standard_parallel and resolution_at_standard_parallel
parameters.
Best regards,
Heiko
PS: I don't see any UTM in the lat-lon example???
On 2010-08-16 18:04, Stephane Poirier wrote:
Hi All,
I have netcdf files that are not seen as grided by either netcdf tools
ui 4.2 or my thredds 4.2 server
(http://odin.meteo.mcgill.ca:8080/thredds/catalog/testAll/catalog.html).
The data file
http://odin.meteo.mcgill.ca:8080/thredds/catalog/testAll/catalog.html?dataset=testDatasetScan/MRCC.4.2.0_amno_adj_alsi_ps_196012_r%28cf-1-4%29.nc
is representative of many terabytes of netcdf files that we are to make
available to public BUT do not fully comply to geogrid specifications
CF-1.0/COARDS (I think our files are close to be complying but something
is missing in our polar stereographic netcdf headers).
For modifying netcdf variables, I am planning on using NcML (as shown
http://www.unidata.ucar.edu/projects/THREDDS/tech/tds4.2/tutorial/NcML.htm)
BUT I don't exactly know what parameters are missing in order to connect
the polar_stereographic netcdf header information to our x and y axis.
Here attached, I have included the 2 differents types of netcdf header
we use, a netcdf dump of lat lon UTM data (which works fine with all
enabled thredds services) and a netcdf dump for polar stereographic data
(which is not perceived as gridded data just yet, see file
2010aug16_polar-stereo-netcdf_ccrm-sample.txt).
Must grid_mapping_name = polar_stereographic be specified somewhere
within our header? Do we properly link the polar_stereographic structure
to the x and y axis (xc,yc structures)?
Regards,
Stephane
--------------------------------------------------------------------
Stephane Poirier, M.Sc. Optical Physics
Remote Sensing Application Software Developer
Geography Department, Burnside Hall
McGill University, Montreal, QC, Canada
http://geog.mcgill.ca
Stephane.Poirier2@xxxxxxxxx <mailto:Stephane.Poirier2@xxxxxxxxx>
Cell. (514) 994-3532
Fax: (514) 509-8833
--------------------------------------------------------------------
Stephane Poirier, M.Sc. Optical Physics
Remote Sensing Application Software Developer
3532 rue Sainte-Famille, Apt. 4
Montreal, QC, H2X 2L1, Canada
http://www.oifii.org
stephane.poirier@xxxxxxxxx <mailto:stephane.poirier@xxxxxxxxx>
Tel.: (514) 509-8833
Fax: (514) 509-8833
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