メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.370723602606 43.0951042394408, 141.37140642995 43.0951964751499, 141.371136832617 43.0963372014712, 141.370440298774 43.0962564620639, 141.370146646082 43.0962155959544, 141.369475133032 43.0961235097523, 141.369592071187 43.0957121581672, 141.369686302949 43.0953381862089, 141.369776675047 43.09498563387, 141.370723602606 43.0951042394408)) ^^http://www.opengis.net/ont/geosparql#wktLiteral