geotrellis/geotrellis — pull request #746 by joshmarcus (2014-02-26 21:01:13+00:00)
Title: Create gaussian with parameters in map units.

This commit adds a method to create a gaussian kernel with a
RasterExtent and additional parameters in map units instead of
pixels. This is useful because, in practice, you almost always
want to define the kernel in terms of map units -- so this reduces
the busy work (as first noted in the ahinz kernel density demo).