メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.946076946456 42.9430947940445, 142.945453010432 42.9425382546166, 142.945406869148 42.9424959146779, 142.945467535313 42.9424595370685, 142.94653126356 42.9418042731086, 142.946754253481 42.941998368444, 142.946976978768 42.942194081781, 142.947242875765 42.942427651747, 142.946131162013 42.9430638008718, 142.946076946456 42.9430947940445)) ^^http://www.opengis.net/ont/geosparql#wktLiteral