メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.761765366514 42.900982602972, 140.761192888268 42.9010102399876, 140.760675867017 42.9010351517699, 140.759516823224 42.9010912832585, 140.75939216644 42.8997795152603, 140.759275494828 42.8985932521965, 140.760478701524 42.898532562041, 140.760534056082 42.8985300489979, 140.761531485257 42.8984852328662, 140.761554412865 42.8989841850967, 140.762275051488 42.8989050223455, 140.76294863822 42.8993551938312, 140.762950303671 42.8994013533248, 140.763119605206 42.9009170318059, 140.76264922759 42.9009398165019, 140.761765366514 42.900982602972)) ^^http://www.opengis.net/ont/geosparql#wktLiteral