R

r-tree

Ruby extension for the R-tree spatial index of Guttman-Green

The Guttman-Green R-tree spatial indexing algorithm, as a library

Python extension for the R-tree spatial index of Guttman-Green

Octave extension for the R-tree spatial index of Guttman-Green

3D spatial zone engine for geofencing, spatial queries, occupancy, pathfinding, realtime synchronization, and sensor-aware applications.