メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.336994797045 36.7651561321258, 137.3367959432 36.7652704043329, 137.336350166562 36.7645378176278, 137.336633430943 36.7645035492156, 137.336718018439 36.7646574802257, 137.336821866097 36.7648760168753, 137.336925671378 36.7650637861218, 137.336994797045 36.7651561321258)) ^^http://www.opengis.net/ont/geosparql#wktLiteral