メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.244987169158 37.1091930805202, 138.245069291511 37.1097775855894, 138.245200817784 37.1108552834695, 138.244520536128 37.1109030916715, 138.243696344298 37.1109667745563, 138.243549967457 37.1099856336148, 138.243526453544 37.109835275731, 138.243423925141 37.1091794100396, 138.243392345174 37.1089773619504, 138.244268905252 37.1089402640299, 138.244959717432 37.1088792455793, 138.244987169158 37.1091930805202)) ^^http://www.opengis.net/ont/geosparql#wktLiteral