libpysal.cg.fast_threshold¶
-
libpysal.cg.
fast_threshold
(pts, dist, radius=6371.0)[source]¶ Find all neighbors on a sphere within a threshold distance
- Parameters
- pointslistlist of lat-lon tuples (Note, has to be a list, even for one point)
- dist: float
threshold distance
- radius: float
sphere’s radius
- Returns
- dict:
key is id of point, value is a list of ids for other points within dist of key point