[Gdal-dev] image subsetting for arbitrary polygon

[Frank Warmerdam]

Xiaodong Zhang wrote:
> Hi,
> 
> Does anybody know of an open source code for subsetting an image with an 
> area of interest of arbitrary shape. I know GDAL utility offers one 
> function for subsetting an image by a rectangle. Thanks
> 
> Xiaodong

Hi,

I am not aware of any such utility.  By arbitrary I assume you mean produce
a rectangular output file, but mask all data outside some polygon or set of
polygons?

Such a thing could be implemented in python using the openev polygon
rasterization and GDAL builtins, but it wouldn't be exactly trivial. :-)

Best regards,


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