29·
15 days agoThere is Cesium. But the thing you actually need is the actual maps. There are free maps (many of them based on OpenStreetMap), but the fidelity you know from Google Earth is usually not free. Also if you also want to self-host the actual maps you need a tile server for that and lots of disk space because these tiles take up a lot of it…
alternativeto.net is also my go-to resource because they have a good filtering system and are not solely focused on open source.