メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.120560657174 36.7576709163763, 137.120135345377 36.7578288870312, 137.118934538844 36.7582731039434, 137.118787750369 36.757922565476, 137.11856992694 36.7579882397434, 137.118246531351 36.7570834644801, 137.120260670241 36.7565989434853, 137.12035900623 36.7568450489553, 137.120477966479 36.7572746401438, 137.120560657174 36.7576709163763)) ^^http://www.opengis.net/ont/geosparql#wktLiteral