メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.356496091316 43.0835367431443, 141.356352520089 43.0840995158382, 141.355700291143 43.084011077623, 141.355536155633 43.0839888361668, 141.354786098861 43.0838911168578, 141.354930010798 43.0833125245273, 141.355067385997 43.0827542759683, 141.35664735714 43.0829593309419, 141.356496091316 43.0835367431443)) ^^http://www.opengis.net/ont/geosparql#wktLiteral