Grib Coordinate System Conversion

[Rich Signell]

Gereg,

I hate to sound like a broken record, but one approach would be to use 
the fabulous GDAL package

   http://www.remotesensing.org/gdal/

which makes converting a GeoTIFF from one projection to Lambert as easy as:

gdalwarp -t_srs "+proj=lcc +lat_1=XX +lat_2=XX" proj_x.tif lambert.tif

If the GeoTIFF you want to convert doesn't have the proper projection 
info, you can specify that as well:

gdalwarp  -s_srs "EPSG:4326" -t_srs "+proj=lcc +lat_1=XX +lat_2=XX" 
proj_x.tif lambert.tif

Here we are mixing EPSG specification with PROJ4 WKT. Other flavors of 
WKT work as well.

The easiest way (and what I do) to get GDAL built with all the goodies 
is download "FWTOOLS" from

   http://fwtools.maptools.org/

which is a complete binary distribution for both Linux and PC containing 
GDAL as well as Python, OpenEv, Mapserver.


-Rich


Cordes Gregory M Contr AFWA/XPSI wrote:
> We are using NetCDF 2.2.15, to exact information from a grib file and 
> generate a geotiff, and it works great.  However, our gridded comes in, 
> in various projections (i.e. Stereographic, Lat/Lon, Lambert, Mercator, 
> etc.).  Is there a simple way to convert a particular projection, say 
> Stereographic, to Lambert?  It appears that we will have to take the 
> grib file, extract the parameter of information, and write a new cdf 
> file, and use the new cdf file to generate the geotiff, correct?
> 
>  
> 
> Thanks,
> 
> Greg
> 
>  
> 

-- 
Richard P. Signell
U.S. Geological Survey       Phone: (508) 457-2229
384 Woods Hole Road          Fax:   (508) 457-2310
Woods Hole, MA  02543-1598

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