メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.043674296386 37.9170526039887, 139.044210678122 37.91747261065, 139.043854030577 37.9177509048002, 139.04332576427 37.9173231156212, 139.042763175622 37.9168546552628, 139.043106008636 37.9165703752658, 139.043674296386 37.9170526039887)) ^^http://www.opengis.net/ont/geosparql#wktLiteral