メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.918672512178 43.5251687564586, 141.918808204195 43.5256688783792, 141.918872570226 43.5259060595448, 141.918980303088 43.5262713226879, 141.919037753512 43.5264660428669, 141.919245300155 43.5271696459009, 141.917683834132 43.5274190539425, 141.917634896403 43.527254457187, 141.917293597191 43.5261894824361, 141.917252056569 43.5260598231294, 141.917017412777 43.5253276552946, 141.917021964262 43.5252472855568, 141.918640681021 43.5250434501994, 141.918672512178 43.5251687564586)) ^^http://www.opengis.net/ont/geosparql#wktLiteral