Clip geospatial images into smaller chunks
requires: libgdal and gdal python wrapper.
USAGE: python range_clipper.py mynmar_copy.tif 200821.400 2316187.200 204283.900 2313922.700
USAGE: python grid_clipper.py mynmar_copy.tif 10 10
Expects lat/lng values projected to geotif's plane for range clipping (top_x, top_y), (bot_x, bot_y).