メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.373411250442 43.1114403185645, 141.374254046688 43.1115568262436, 141.374173975172 43.1118737362245, 141.374144601378 43.1119813207229, 141.374071292374 43.1122414589465, 141.374059302343 43.1122878521373, 141.373981166254 43.1125901489426, 141.372308584074 43.1123720605874, 141.372408726923 43.1120015069798, 141.372483955299 43.1117486282224, 141.372569511129 43.1113240225206, 141.373411250442 43.1114403185645)) ^^http://www.opengis.net/ont/geosparql#wktLiteral