azavea/geotrellis — pull request #203 by joshmarcus (2012-10-02 19:38:06+00:00)
Title: Topic/tile issues

This pull request resolves two issues with tiled rasters and operations on them.

The tiles were being generated with the origin tile placed in the lower right position (like TMS) but the specification is for the origin tile to be placed in the upper left.

This commit also adds a new map/reduce style operation class with a build in threshold for how many operations to run in parallel.