OpenStreetMap, despite having “map” in its name is more than just a map, and certainly more than just a street map. It’s a collaboratively authored and edited geodatabase. You can enter anything that is objectively verifiable “on the ground” into it, and conversely you can find almost everything in it, though without any claim of accuracy, completeness or up-to-date-ness. (Though if you notice anything to be inaccurate, incomplete or out-of-date, you’re free to improve it.) The data for the complete “planet” can be freely downloaded and analyzed, or used to build your own maps, navigation, or what-have-you. There’s a whole ecosystem of third-party services, tools and derived works (such as maps) that has developed around that.
The data model is unlike the others commonly found in the GIS world, which makes analysis of OpenStreetMap data with general-purpose GIS tools cumbersome at times.
Disclosure of conflicts of interest:
- a user and contributor of OpenStreetMap
- a member of the OpenStreetMap Foundation (OSMF)
- a board member of the Swiss OpenStreetMap Association (SOSM), the Swiss local chapter of the OSMF