Show HN: Cartopolis, interactive globe-sized 3D world

It already uses a harness (lightweight viewer) to generate screenshots with. The agent already sometimes compares it with the aerial layer, but I didn't gave it much thought. Currently, the most difficult things to get right are tunnels and bridges. Comparing it to real location imagery would probably help. I'll give it a try. Thanks for the suggestion!

Yes, it is all still very experimental. I think the data pipeline (gathering and constructing the tiles mostly) is still a bit problematic. I mostly test from the Android build at the moment, but I'll see if I can give the wasm build a bit more focus.

It is basically an openstreetmap viewer plus a simulator layer that turns the data (https://versatiles.org/) into 3d at a certain level of detail. The Netherlands have very detailed geo data-sets (https://www.pdok.nl/), which are used to augment the 3d representation with stuff like point-cloud rendered buildings (3DBAG), crop-rendering, benches, etc.. Basically, it tries to combine as much public data as possible, to represent a city. The simulator is then used to be able to navigate through it with an avatar and to build basic stuff (Secondlife prim-style + Lua scripting engine).