S-zation
Thanks for changing it back.
Military areas in Pokemon Go are set up so that they do not spawn pokemon because they are restricted areas.  But in the recent update, any area that has a military base nearby shows up as a blank space (this is a rendering problem in Pokemon Go, so be on the lookout for anyone removing OSM military areas)

This link shows the rendering problem:
https://www.reddit.com/r/TheSilphRoad/comments/7gtr00/huge_chunks_of_map_missing/