メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.700986074182 44.3625507835673, 141.699900160471 44.3632606483705, 141.699791875202 44.3631799651586, 141.699380877764 44.3628530902627, 141.699066216449 44.362606276751, 141.698881007937 44.3624665442209, 141.699429302292 44.3620939599947, 141.699969366334 44.361762219712, 141.700292950027 44.3620137863518, 141.700844928311 44.3624413256067, 141.700986074182 44.3625507835673)) ^^http://www.opengis.net/ont/geosparql#wktLiteral