メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.772274138946 35.4417337951178, 136.77209748764 35.4423410528157, 136.771401768314 35.4422093637966, 136.771157134848 35.4421552607895, 136.770651137089 35.4417732073666, 136.771707957886 35.4414815127401, 136.771575772306 35.4411141941949, 136.772022810682 35.4410317033828, 136.772143358524 35.4413511316994, 136.77240806727 35.441276323236, 136.772274138946 35.4417337951178)) ^^http://www.opengis.net/ont/geosparql#wktLiteral