Quadtools
Work with quadkeys.
Quadkey from lon, lat, and zoom
>>> quadtools.quadkey(-3.7, 42.4, 5)
'03133'
Parent
>>> quadtools.parent('031332')
'03133'
Children
>>> quadtools.children('01')
['010', '011', '012', '013']
Siblings
>>> quadtools.siblings('011')
['010', '011', '012', '013']
Neighbors
>>> quadtools.neighbors('032')
['021', '030', '031', '023', '032', '033', '201', '210', '211']