メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.490916584319 40.508046579054, 141.490165178741 40.5088113060986, 141.489231203349 40.5082864670318, 141.489525933066 40.5079538543715, 141.488805529986 40.5075543736156, 141.489137566309 40.507219298218, 141.490062011311 40.5077186508725, 141.490440291977 40.5073149562516, 141.490787030608 40.5075046372577, 141.491202215382 40.5077509183702, 141.490916584319 40.508046579054)) ^^http://www.opengis.net/ont/geosparql#wktLiteral