メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.406004827535 43.0355819325774, 141.405447626157 43.0357972568177, 141.405145043173 43.0359093827057, 141.404970566166 43.0359782155825, 141.40446331202 43.0361654194058, 141.404211452791 43.0358089527491, 141.404428346573 43.0354858378571, 141.404668929924 43.0351199959359, 141.40489139556 43.0347747665349, 141.405615692795 43.0350281647432, 141.406004827535 43.0355819325774)) ^^http://www.opengis.net/ont/geosparql#wktLiteral