メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.315024018154 42.2848574206352, 143.315641297954 42.2851239002191, 143.31518367454 42.2857485255124, 143.31512018801 42.2858260642514, 143.314488345243 42.2855614050598, 143.314424997381 42.2855348422377, 143.313807087343 42.2852759588846, 143.313876924841 42.2851872484131, 143.314345098575 42.2845642185131, 143.31494901552 42.284824916936, 143.315024018154 42.2848574206352)) ^^http://www.opengis.net/ont/geosparql#wktLiteral