GEOADD
Add geospatial members (longitude/latitude) to a geo set.
GEOADD key [NX|XX] [CH] longitude latitude member [longitude latitude member ...]
Complexity
O(M log N); CH adds an O(M^2) term
Complexity and compatibility are read out of kevy's implementation, not copied from Redis's reference. Several genuinely differ.
Redis compatibility
Compatible
Behaves as Redis does.
See also
GEODISTGEOHASHGEOPOSGEORADIUSGEORADIUSBYMEMBERGEOSEARCHGEOSEARCHSTORE