メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.762703469424 43.1983618980998, 141.763159669727 43.1985955709636, 141.76251082304 43.1993057957737, 141.762304231815 43.1995544404333, 141.761901243274 43.1999840446804, 141.761596261122 43.1998216933559, 141.761693718892 43.1997336347605, 141.761598511067 43.1995271681308, 141.761138001642 43.1993032468717, 141.761249801668 43.1991827598624, 141.761593755938 43.1988206298576, 141.762262319467 43.198146079952, 141.762703469424 43.1983618980998)) ^^http://www.opengis.net/ont/geosparql#wktLiteral