I have a solar array on my roof. If I find my house in OSM, there’s a lightning bolt icon indicating there’s a solar array present. Not only that, but the exact layout of the panels in my roof is shown. I never submitted this info to anyone, Google Maps Satellite view doesn’t show them. I’m really curious where OSM got such detailed data.
Exactly. OpenStreetMap has a big community which is contributing. And every change can be reviewed. Or reverted if its wrong. In the changeset there should also be a source tag like “aerial imagery”, the Editor which was used and also which background imagery was used during edit. For example Bing Maps allows their high resolution imagery to be used for OpenStreetMap.