メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.901259527435 43.1085894579471, 142.899486987832 43.1083442957519, 142.898176362235 43.1081629555256, 142.898628050122 43.1065603237233, 142.899823469189 43.1067470249683, 142.901748759432 43.1070633294556, 142.901671147492 43.1073067609527, 142.901259527435 43.1085894579471)) ^^http://www.opengis.net/ont/geosparql#wktLiteral