geodist
GEODIST
GEODIST key member1 member2 [unit]
Return the distance between two members in the geospatial index represented by the sorted set.
Given a sorted set representing a geospatial index, populated using the GEOADD command, the command returns the distance between the two specified members in the specified unit-
If one or both the members are missing, the command returns NULL-
The unit must be one of the following, and defaults to meters:
- m for meters-
- km for kilometers-
- mi for miles-
- ft for feet-
The distance is computed assuming that the Earth is a perfect sphere, so errors up to 0-5% are possible in edge cases-
Return value
