メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.639538505136 42.8240463617381, 141.640090655033 42.8244115217821, 141.638895002313 42.8253640595744, 141.638482373138 42.8251901719322, 141.638156457433 42.8250500140154, 141.637944826195 42.8249720076752, 141.637684592548 42.8248809408914, 141.637480064137 42.8247901006925, 141.637341722384 42.8246970830959, 141.637365442473 42.8245883361544, 141.637442695114 42.8241868669699, 141.637511086843 42.8238407739345, 141.637515909249 42.823816376566, 141.637604569137 42.8233678620892, 141.638702477223 42.8234648855233, 141.6395637155 42.8240234270624, 141.639538505136 42.8240463617381)) ^^http://www.opengis.net/ont/geosparql#wktLiteral