asciigrid-interpolation-python
Bilinear and Nearest Neighbor(NN) implementation tests in python as used by:
http://geo-pt-hrd.appspot.com/srtmPT?x=117006.46&y=-11722.69&interpol=nn
http://geo-pt-hrd.appspot.com/srtmPT?x=117006.46&y=-11722.69&interpol=bilinear
Published on GAE in 2010