Elevation

Description:
Along with determining where the balloon will reach altitude 0, it is also important to know where the balloon will actually hit the ground. So, given a coordinate, we should be able to tell where ground level is (in meters).

Helpful Stuff:
http://dds.cr.usgs.gov/srtm/version2_1/SRTM1/Region_06/ - Elevation data for our region.
http://www.numpy.org/ - Use numpy’s readfile function
