メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.768015137134 43.206736840335, 141.767700615026 43.2070901805161, 141.767356184852 43.2074315786178, 141.766861848802 43.2079578700574, 141.766770308457 43.2080505275764, 141.765821872681 43.2075893870068, 141.766774225023 43.2066202097048, 141.767110015639 43.2062646410187, 141.768015137134 43.206736840335)) ^^http://www.opengis.net/ont/geosparql#wktLiteral