メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.895248080996 35.2453382410937, 136.894026849172 35.2454724571278, 136.89407369962 35.2444874765491, 136.893431369761 35.2445420080576, 136.893416315243 35.2430802552937, 136.893418765768 35.2430532180593, 136.895568484797 35.2434373072812, 136.895248080996 35.2453382410937)) ^^http://www.opengis.net/ont/geosparql#wktLiteral