FlatCityBuf — API documentation

A cloud-optimized binary format for 3D city models: CityJSON in FlatBuffers, with a packed Hilbert R-tree, a static B+tree attribute index, and HTTP range reads.

• Rust — fcb_core Reader and writer. The reference implementation, and the oracle the other three are validated against. Also on docs.rs.
• C++ — flatcitybuf Native C++17 reader. No FFI, no async runtime.
• Python — flatcitybuf Pure-Python reader. No compiled dependency.
• TypeScript — @cityjson/flatcitybuf Pure TypeScript reader. Runs in Node and the browser.