RomanOn OpenStreetMap (OSM), in editing mode, I see a lot of tagged objects that are not visible on the public map. For example street lamps 💡. And even trees 🌳.
This is fantastic! I just wonder what the purpose is?
das-g@rom255 Despite its name, OpenStreetMap is not a map, it's a geographic data collection. The map you see on https://osm.org is just one of many that can be generated from that data. (In fact, osm.org itself already let's you choose between several map renderings. For more, head to e.g. https://openwhatevermap.xyz.) Beyond maps, OSM data can be used for navigation, for analysis, for creating game worlds (e.g. for TuxCart) imitating the real world, and for many more applications.
@rom255 There are OSM map styles that do display trees, and it's imaginable to make a router that gives preference to lit streets, taking street lamp data into account.