https://github.com/daniel-j-h/zindex this little cloud-native spatial index made it into #WeeklyOSM 😍
With DuckDB-WASM spatial queries against a single static file are a thing!! What!! 😮
Example:
A very fast cloud-native static spatial index for 2D points based on a Z-Order space filling curve and BIGMIN search space pruning - daniel-j-h/zindex