> If you release the shapefile constraint, GMT's grdtrack program is lightning > fast > in interpolating a grid into a series of x,y positions.
Well, the only reason I'm using shapefiles is because that's what the mapping department gave me. If a shapefile can be converted into a grdtrack, using some sort of automatic process, then I'm completely ready to switch. Since I don't need much from the data, and won't ever, it doesn't hurt right now to change directions. Kenn P.S. Since it's now clear to me that my my request is outside the scope of GDAL/OGR, if someone wants to steer me to a better forum I'd be happy to repost there. _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
