メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.549636662284 43.2396022473169, 143.548187885875 43.2396668401039, 143.548183713122 43.2396153359568, 143.548096602746 43.2385352975376, 143.549534935803 43.2384740597789, 143.549631368632 43.2395433724163, 143.549636662284 43.2396022473169)) ^^http://www.opengis.net/ont/geosparql#wktLiteral