ring is a flat, open (first vertex not repeated) list of [lng, lat, ...]
pairs in degrees, wound in any direction. Longitudes may be "unwrapped"
past +/-180 by unwrapLongitudes; consumers that build Cartesian positions
are unaffected by this, since 190 and -170 map to the same point.
A cell boundary ready for rendering.
ringis a flat, open (first vertex not repeated) list of[lng, lat, ...]pairs in degrees, wound in any direction. Longitudes may be "unwrapped" past +/-180 byunwrapLongitudes; consumers that build Cartesian positions are unaffected by this, since 190 and -170 map to the same point.