azavea/geotrellis — pull request #271 by lossyrob (2012-12-13 16:19:23+00:00)
Title: Unit tests for Focal ops

Also, modified Hillshade to count the focal value for each of the missing neighborhood cells in edge neighborhoods (instead of leaving them out, setting them to 0, or setting them to NODATA. GDAL does the former, Esri does what we do now)

- Added task that runs focal operations on an input ARG file, and outputs to an ARG file. Currently only implements Aspect, default Slope and default Hillshade.
- Included test framework that makes testing focal operations under different scenarios consice.