[Gdal-dev] gdal_contour crashing

NopMap ekkehart at gmx.de
Wed Nov 11 14:45:17 EST 2009


Frank Warmerdam wrote:
> Also, high contour density
> can occur if there are crazy no-data values in the raster (ie. -1e7 in a
> floating point raster) which can trigger a huge "pile" of contours around
> the bad data value.

I think you are right. After another subdivision, both halves did process

Looking for artefacts in the data, I noted that there is a very unnatural
drop at the coastline that also produced a bunch of contours where there
should be none. Probably the coastline is some kind of "cliff" in the data.
Do you think this could be responsible?

Being a GIS amateur: Is there a way to get the sea level to 0 and eliminate
this weird "cliff" along the coastline?


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