Extract points within a shape from a raster

Posted by user308827 on Stack Overflow See other posts from Stack Overflow or by user308827
Published on 2010-05-05T03:02:56Z Indexed on 2010/05/05 15:08 UTC
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Hi,

I have a raster file (basically 2D array) with close to a million points. I am trying to extract a circle from the raster (and all the points that lie within the circle. Using ArcGIS is exceedingly slow for this. Can anyone suggest any image processing library that is both easy to learn and powerful and quick enough for something like this?

Thanks!

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