メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.365548624487 43.071080395084, 141.364366869814 43.0709595754714, 141.364542433099 43.0702060863429, 141.364334707926 43.0701820440806, 141.364417272618 43.0698378578849, 141.365786887364 43.0700150563531, 141.365674723076 43.0705036131246, 141.365548624487 43.071080395084)) ^^http://www.opengis.net/ont/geosparql#wktLiteral