メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.343291717065 43.0855925232591, 141.344149381948 43.0857200090249, 141.344066479414 43.0860259151866, 141.343956175328 43.0864330879293, 141.343871901183 43.086779329306, 141.343786211608 43.0871313711249, 141.342933499344 43.087011588614, 141.342250342811 43.0869243017896, 141.342420252945 43.0862241919905, 141.342509004707 43.0858606644501, 141.342593163623 43.0855156664523, 141.343291717065 43.0855925232591)) ^^http://www.opengis.net/ont/geosparql#wktLiteral