KartaView and Mapillary are open data Street View alternatives, though they mostly rely on dash cam footage, and thus often don't have fully panoramic views. T

KartaView and Mapillary are open data Street View alternatives, though they mostly rely on dash cam footage, and thus often don't have fully panoramic views. There's also OpenDroneMap, which is more drone-focused and captures full 3d point clouds, but that still isn't quite the same as what you're proposing.