Article directory
gaospatial geographic information
City latitude and longitude query
* Add one or more geolocation coordinates
GEOADD key longitude latitude member [longitude latitude member ...]
The key is the index of the geographic location.
longitude represents the longitude of the location.
latitude represents the latitude of the location.
Member represents the place name
[longitude latitude member …] which can be added repeatedly, separated by spaces.
Query the coordinates of one or more locations (can only query previously added ones)
geopos key member
Find the distance between two places
getdist key member1 member2
(You can add units after, m is meters, km kilometers, ft feet, mi miles, you can not write the default is meters)
** Search for geographic location with coordinates as the center**
georadius key longitude latitude radius m|km|ft|mi [WITHCOORD] [WITHDIST][WITHHASH] [COUNT count] [ASC|DESC]
Optional parameters:
[WITHCOORD], indicating whether to output the latitude and longitude
[WITHDIST], indicating whether to output the distance
[WITHHASH], indicating whether to output the hash value
[COUNT count], indicating that several data are output
[ASC|DESC], indicating that the distance is in ascending order Or descending order, ASC ascending order, DESC descending order
The query will only find the added position coordinates
Location-centric search for geographic locations
georadiusbymember ...
(The parameters are the same as the above coordinates as the center)
Hyperloglog cardinality statistics
Cardinality calculation: the number of data in a set of data after removing duplicate elements
Create a set of data
pfadd key element
Statistical base
pfcount key
Merge datasets
pfmerge destkey sourcekey
destkey is the name of the
dataset to be merged into sourcekey is the name of the dataset to be merged, there can be multiple, separated by spaces
Bitmap Bitmap
Input bitmap dataset
setbit key offset value
key is the index of the data set
offset is the subscript of the data
to be input value is the data to be input, 0 or 1
count the number of 1
bitcount key [start end]
start end is the starting subscript of the query, without writing all the data in the default statistical data set