Frank Warmerdam wrote:
gdal_fillnodata attempts to do interpolation and was designed with the idea of filling in between contours and holes in elevation products. It isn't perfect of course, but isn't the stepwise result you are expecting.
my bad -- I was making assumptions...
The algorithm effectively involves radial searches out from each pixel to be interpolated, in 4 (or 8?) directions and then weighted distance interpolation from the hits.
Well worth giving a try, but it sounds like it's using methods for interpolation arbitrarily spaced data. contours are a special case, as there is lots of data at particular elevations, and there is a known relationship between these points. What this means is that a method designed specifically for interpolating contours may work better.
gdal_fillnodata is sure worth a try, though. -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
