メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.35361892931 43.0544095101753, 141.35349650881 43.0549328588323, 141.351938320883 43.0547306763254, 141.352081989633 43.0542111520447, 141.352230565322 43.0536903309918, 141.353751022226 43.0538934802833, 141.35361892931 43.0544095101753)) ^^http://www.opengis.net/ont/geosparql#wktLiteral