[Gdal-dev] question about AsciiGrid
nhv at cape.com
Fri Apr 15 14:39:58 EDT 2005
Frank Warmerdam writes:
> On 4/15/05, jluis at ualg.pt <jluis at ualg.pt> wrote:
> > Hi,
> > I think this is closly related to my early post
> > http://xserve.flids.com/pipermail/gdal-dev/2005-March/008269.html
> > The metadata solution seams a good idea to solve this grid vs pixel
> > registration
> > or "pixel is area" vs "pixel is point" issue.
> But I think in the case of your post, the netCDF driver has failed to
> "adjust" things to the GDAL pixel-is-area model properly because I didn't
> realize the netCDF was pixel-is-point. The important part to solve that
> problem is to fix the driver to adjust the extents properly. As a secondary
> issue, the driver could return metadata indicating if the pixels should be
> interpreted as points or areas.
GMT '.grd. files can be either 'line' or 'pixel' oriented
see the "node_offset" member in the GRD_HEADER struct
This is in "gmt_grd.h"
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