I have about 50 000 points (latitude and longitude), and I would like to find out in which country each of the points is located. It does not need to be super precise, though.
(Or actually I only need to classify them to larger geographical areas (North America, South America, Europe, Africa, Middle East, Ex-USSR, Asia, Oceania), but I assume classifying the points to countries and then the countries to larger geographical area is the way to do it.)
How should I proceed?
I would prefer a programmable or a command line solution.