メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.329333529374 43.1166816860273, 141.329661948273 43.1170209850131, 141.330353846663 43.117705415995, 141.329996385876 43.1178938978915, 141.329617246481 43.1180937381822, 141.32882018037 43.1185122305461, 141.328476656014 43.1181621187991, 141.328145064542 43.1178295431344, 141.327798151856 43.1174945914213, 141.32744520542 43.1171460880092, 141.328256959857 43.1167270198785, 141.329003430456 43.1163457490168, 141.329333529374 43.1166816860273)) ^^http://www.opengis.net/ont/geosparql#wktLiteral