メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.373569291288 43.0528422276162, 141.373931820667 43.053150727007, 141.37375037876 43.0532583489224, 141.373721842542 43.0532755722948, 141.373285097518 43.0535388489035, 141.373269330482 43.0535483632274, 141.372918401845 43.0532401621963, 141.37257432525 43.0529291994123, 141.373210416139 43.0525399449918, 141.373569291288 43.0528422276162)) ^^http://www.opengis.net/ont/geosparql#wktLiteral