# array of 64 chars to encode 6 bits. this is almost like base64 encoding, but
# the symbolic chars are different, as base64's + and / aren't very
# URL-friendly.
# array of 64 chars to encode 6 bits. this is almost like base64 encoding, but
# the symbolic chars are different, as base64's + and / aren't very
# URL-friendly.
##
# Given a string encoding a location, returns the [lon, lat, z] tuple of that
##
# Given a string encoding a location, returns the [lon, lat, z] tuple of that