メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.762882584239 43.2032236013226, 141.762577448655 43.203549611397, 141.762285000744 43.2038454324326, 141.761355513621 43.2033960797043, 141.761374643269 43.2033750129143, 141.761621796778 43.2031028220944, 141.761931107623 43.2027779593841, 141.762882584239 43.2032236013226)) ^^http://www.opengis.net/ont/geosparql#wktLiteral