Hi Stephane:
comments are embedded
On 6/4/2010 1:17 PM, Stephane Poirier wrote:
Hi All,
THREDDS WMS requires NetCDF files to identify the coordinates system
used. Checking this (for one of my NetCDF file) by opening in the Grid
Panel of the ToolsUI application, I get the following
http://www.oifii.org/do-org/dod/2010june01_netcdf41-tools_MRCC.4.2.0_amno_adj_alsi_ps_196012_r-nc.jpg
This is the right screen to look at (although i'd recommend starting to
use the 4.2 ToolsUI). The dataType column shows "grid" when its
succcessfully recognized as a "GeoGrid", which in this case it is not.
Given that "coordTranforms" column in the middle table is blank, its
likely not picking up the projection. Do you have the data variable
pointing to it? The info button has some useful info. Also, try
selecting "alsi" data variable in first table, then right click and do
"try as Grid".
Send a dods URL if these pointers are insufficient.
http://www.unidata.ucar.edu/Projects/THREDDS/tech/tds4.0/reference/WMS.html page states,
in order to comply to WMS requirements, a NetCDF files should have one
or more variables shown as a GeoGrid. How can one tell a variable is
shown as a GeoGrid?
Alternatively, when I look at one of UCAR's NetCDF file (that seems to
comply with the GeoGrid requirement), I get
http://www.oifii.org/do-org/dod/2010june01_netcdf41-tools_ucar-station-profiler-wind_example.jpg.
How can one tell a variable is shown as a GeoGrid?
This is definitely not a Grid, its point obs data. To simplify, a grid
will have lat(lat), lon(lon), but a point data has lat(pt), lon(pt).
Regards,
Stephane
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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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