pysal/pysal — pull request #532 by lanselin (2014-12-03 23:56:05+00:00)
Title: new functions to deal with spherical geometry: lat-lon conversion, degre...

...e to radian and radian to degree conversion (as lambda functions),

radian angle function (in radians), alternative arc distance function (using haversine formula), and geo-interpolate (way finding of a point
on the great circle distance between two given points)