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+Performs cartographic transformations and geodetic computations.
+
+The Proj class can convert from geographic (longitude,latitude) to native map
+projection (x,y) coordinates and vice versa, or from one map projection
+coordinate system directly to another.
+
+The Geod class can perform forward and inverse geodetic, or Great Circle,
+computations. The forward computation involves determining latitude, longitude
+and back azimuth of a terminus point given the latitude and longitude of an
+initial point, plus azimuth and distance. The inverse computation involves
+determining the forward and back azimuths and distance given the latitudes and
+longitudes of an initial and terminus point.
+
+Input coordinates can be given as python arrays, lists/tuples, scalars or
+numpy/Numeric/numarray arrays. Optimized for objects that support the Python
+buffer protocol (regular python and numpy array objects).