[wcrossbow]

Im assuming the polygons dont change to often so you can amortize the construction of the quadtree. Depending on your world view the implementation is trivial since Shapely, a dependency they already likely have, has an implementation of it.

[ohr]

Author here: actually, in this analogy (as this is just a demo library), the polygons change each time so we couldn't use this type of optimization (at least not in a straightforward way).