Google has released source code for a tool they call “Regionator“. The code will enable developers to more rapidly develop interfaces to large databases of placemarks, images, and other data with KML 2.1 and the new GE 4. Presumably it takes advantage of the new level of detailing features and view based refreshes so only the data which is needed for the current view is presented. This should enable whole-Earth historic maps, more accurate local information overlays from GIS servers, new sets of aerial/satellite photography, and higher-precision scientific data to be shared with Google Earth. Hopefully, by releasing this source code, we will see even more exciting new visualizations in Google Earth.