The enthusiast pulls data from a Google service that contains virtual models of some major cities and landmarks. Then he edits them in Blender and, using his program, converts the objects into maps for play.
Judging by the results, the project does a reasonably good job of handling both relatively small objects and entire areas. In theory, KevinJNguy01's developments could make it easier for other authors to create game worlds.
The Redditor does not plan to publish the free access program since it contradicts Google's user guidelines.