メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.324651633146 43.0857647428994, 141.324216760397 43.0860205233436, 141.323829078266 43.0862453878567, 141.323542162461 43.0859852377452, 141.323132893394 43.0856242972463, 141.323959609153 43.0851346871583, 141.324493176212 43.0848111351567, 141.324557461758 43.0848622925469, 141.325195438194 43.085436839711, 141.324651633146 43.0857647428994)) ^^http://www.opengis.net/ont/geosparql#wktLiteral