メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.350768117487 43.7612027876539, 142.350170287143 43.7616812202438, 142.34991407014 43.7615148218885, 142.349162766759 43.7610061496294, 142.348525396962 43.7605577252788, 142.349509747259 43.7597944944023, 142.351164509683 43.7609098084962, 142.351095435122 43.760960863363, 142.350961609468 43.7610597746205, 142.350768117487 43.7612027876539)) ^^http://www.opengis.net/ont/geosparql#wktLiteral