Convert latitude/longitude coordinates into geohash-encoded strings
Usage
gh_encode(latitude, longitude, precision = 6L)
Value
character vector of geohashes corresponding to the input. NA in gives NA out.
Arguments
latitude
numeric vector of input latitude (y) coordinates. Must be in [-90, 90).
longitude
numeric vector of input longitude (x) coordinates. Should be in [-180, 180).
precision
Positive integer scalar controlling the 'zoom level' -- how many characters should be used in the output.
Author
Michael Chirico
Details
precision is limited to at most 28. This level of precision encodes locations on the globe at a nanometer scale and is already more than enough for basically all applications.
Longitudes outside [-180, 180) will be wrapped appropriately to the standard longitude grid.
# scalar input is treated as a vectorgh_encode(2.345, 6.789)
# geohashes are left-closed, right-open, so boundary coordinates are# associated to the east and/or northgh_encode(0, 0)