GDAL NetCDF driver and projection.

• To: galeon@xxxxxxxxxxxxxxxx
• Subject: GDAL NetCDF driver and projection.
• From: "Denis Nadeau" <denis.nadeau@xxxxxxxxx>
• Date: Wed, 26 Apr 2006 09:32:37 -0400

Hi All,

I would like to have suggestions from the community on the current needs for 
the GDAL NetCDF driver.  I am currently writing the CreateCopy method to allow 
people to convert from any GDAL supported format to NetCDF CF-1 convention 
format.

At this point I am stuck with projection issues.  How should I handle DATUM, 
SPHEROID and AUTHORITY?  I can produce a lat lon arrays to reproject the 
projected coordinates to lat/lon space but that may be expensive in cpu and 
space.

I am thinking as well to create an array containning the GeoTransform values if 
found in the source file.

    adfGeoTransform[0] /* top left x */
    adfGeoTransform[1] /* w-e pixel resolution */
    adfGeoTransform[2] /* rotation, 0 if image is "north up" */
    adfGeoTransform[3] /* top left y */
    adfGeoTransform[4] /* rotation, 0 if image is "north up" */
    adfGeoTransform[5] /* n-s pixel resolution */


Thanks for your suggestion,

Best Regards,
Denis Nadeau

• Follow-Ups:
  • Re: GDAL NetCDF driver and projection.
    • From: John Caron
  • Re: GDAL NetCDF driver and projection.
    • From: Rob Cermak