To anyone coming here wondering WTF is Tile38? First I'll tell you what it's not. It's not a replacement for PostGIS, and it's not built on top of Redis.<p>In my opinion PostGIS is the Swiss Army Knife of spatial data management. It's awesome! Especially for large datasets and complex queries. I use it all the time.<p>Tile38 uses the Redis protocol for network transport. There're some commands that loosely resemble Redis like SET and GET, but it's otherwise a completely different project. I originally forked Redis and built the functionality on top of the C codebase. <a href="https://github.com/tidwall/redis-gis" rel="nofollow">https://github.com/tidwall/redis-gis</a>, but scrapped that project.<p>What Tile38 is good for is very dynamic datasets where the application needs fast and simple point-in-polygon queries and streaming geofence notifications. Like vehicle pickup services, bus route services, proximity social apps, etc.