Re: A test quirk - THREDDS WCS server

• To: Frank Warmerdam <warmerdam@xxxxxxxxx>
• Subject: Re: A test quirk - THREDDS WCS server
• From: Denis Nadeau <denis.nadeau@xxxxxxxxx>
• Date: Mon, 7 Nov 2005 22:04:13 -0500

Frank,

It does not seem too hard, we have lambert_conformal_conic projection.
I can get GeoX and GeoY with Coordinates Axis Types, read X and Y and find
out if they link to the name found in the projection data (GeoX and GeoY)
with their proper CoordinatesAxisType metadata. That should work!

I'll give it a quick try this week...

Regards,
Denis

2005/11/7, Frank Warmerdam <warmerdam@xxxxxxxxx>:

Denis,

The ncdump output looks like this:

dimensions:
y = 65 ;
x = 93 ;
variables:
float Z_sfc(y, x) ;
Z_sfc:long_name = "Geopotential height at surface of the earth"
;
Z_sfc:standard_name = "geopotential_height" ;
Z_sfc:units = "gp m" ;
Z_sfc:GRIB_parameter_number = 7 ;
Z_sfc:GRIB_level_flag = 1 ;
Z_sfc:_FillValue = -9999.f ;
Z_sfc:navigation = "nav" ;
double x(x) ;
x:units = "km" ;
x:long_name = "synthesized X coord" ;
x:_CoordinateAxisType = "GeoX" ;
double y(y) ;
y:units = "km" ;
y:long_name = "synthesized Y coord" ;
y:_CoordinateAxisType = "GeoY" ;
char Projection ;
Projection:Projection_Name = "lambert_conformal_conic" ;
Projection:latitude_of_projection_origin = 25. ;
Projection:longitude_of_central_meridian = -95. ;
Projection:standard_parallel = 25. ;
Projection:_CoordinateTransformType = "Projection" ;
Projection:_CoordinateAxisTypes = "GeoX GeoY" ;

// global attributes:
:History = "GeoGrid extracted from dataset /data/mopt/jakarta-to
mcat-5.0.28/content/thredds/wcs/testdata/eta.nc" ;
:Convention = "_Coordinates" ;

It seems to me there would be quite a bit of work making
the GDAL netCDF driver handle this properly, though I am
keen on it happening. :-)

Best regards,

• References:
  • A test quirk - THREDDS WCS server
    • From: Frank Warmerdam
  • Re: A test quirk - THREDDS WCS server
    • From: John Caron
  • Re: A test quirk - THREDDS WCS server
    • From: Frank Warmerdam
  • Re: A test quirk - THREDDS WCS server
    • From: Denis Nadeau
  • Re: A test quirk - THREDDS WCS server
    • From: Frank Warmerdam