R-software
Get flash to fully experience Pearltrees
One of the great things about (software) code is that people build on it and out from it… Which means that as well as producing ever more complex bits of software, tools also get produced over time that make it easier to do things that were once hard to do, or required expensive commercial software tools. Producing maps is a fine example of this. Not so very long ago, producing your own annotated maps was a hard thing to do .
Amateur Mapmaking: Getting Started With Shapefiles