For the map above, for instance, Goldsberry divided roughly half an NBA court (from the baseline to just past the 3-point line) into 1,284 "shooting cells." Then he plotted every shot taken in an NBA game from 2006 to 2011, and color-coded the results. The areas which yielded the most points per shot appear near the red end of the color spectrum; those that yielded the fewest are at the blue end.
If you've read anything about scoring efficiency in basketball, the resulting image will not surprise you (though its elegance is striking). But it conveys far more quickly and powerfully than a set of numbers can what kind of shot distribution an NBA team should be going for, generally speaking.