メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.044241212638 42.9127321163591, 143.044171042035 42.9132360386301, 143.044114489486 42.913641894965, 143.04405776056 42.9140489480009, 143.043325507759 42.9139916997426, 143.042660734762 42.9139400293371, 143.042705697607 42.9135436785071, 143.042751567097 42.9131396557334, 143.042809041211 42.9126335704872, 143.043471965754 42.9126802592009, 143.043832672833 42.9127046308452, 143.044241212638 42.9127321163591)) ^^http://www.opengis.net/ont/geosparql#wktLiteral