When I try to warp the entire world (WGS84) into a UTM zone using gdalwarp, I get a black image.
This is not surprising given the valid domain for such a transformation. The first problem is that the bounding box gets reprojected into outer space (again, b/c it is outside the valid domain). But once I "found" the data, I was able to get something quasi-sensible out of GDAL (image attached). South America shows twice, which, although pretty cool, is another reflection of the domain problem. So my question is: How can I tell programmatically whether (1) any given warp operation makes sense and (2) what its valid input domain is? I was surprised to find that the success vector of GDALReprojectionTransform() does not return failures for out-of-domain inputs (at least it did not in this case). Is it intended to? Kirk
<<attachment: world_utm18.jpg>>
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