メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.327193414398 43.0695064256771, 141.327126143315 43.0697703205216, 141.327050104413 43.0700686758421, 141.326912016398 43.0706406740768, 141.326433656203 43.0705738646293, 141.325401164905 43.0704332271221, 141.325542662068 43.0698522560506, 141.325686081754 43.0692900085727, 141.326220591537 43.0693667687517, 141.327193414398 43.0695064256771)) ^^http://www.opengis.net/ont/geosparql#wktLiteral