GeoNode/geonode — pull request #104 by ischneider (2012-03-16 18:49:30+00:00)
Title: handle invalid y values in forward_mercator better

If a dataset has erroneous y values of large enough of a magnitude, the current forward_mercator implementation will encounter a 'math domain error'. This enhancement ensures invalid values are not passed to the math.log function, updates the doc and test, and ensures the calling code takes appropriate action in this case.