メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.178396564821 34.7898485491957, 137.177945751587 34.7894091278656, 137.178328014837 34.7883498695453, 137.178546583558 34.7885188729367, 137.179065585206 34.7883723323775, 137.179680185056 34.7881694376387, 137.180130884088 34.7879890948352, 137.180204646414 34.7886601153086, 137.179448115565 34.7888680985159, 137.179215952194 34.789070952705, 137.178396564821 34.7898485491957)) ^^http://www.opengis.net/ont/geosparql#wktLiteral