Format specification changelog 3.0.1 (2020-01-28) Enforce 8 byte alignment 3.0.0 (2020-01-28) Optimized spatial index (flatgeobuf#40) 2.0.0 (2019-11-24) (not widely used or implemented) Heterogeneous geometry collections Curved geometries Per feature schema (optional) 1.0.0 (2019-08-25) (not widely used or implemented) Initial proof of concept spec