メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.284806142837 43.0828652524636, 141.285193863342 43.0832203061653, 141.285204527557 43.083231718898, 141.285572414838 43.0835730307517, 141.286001277656 43.0839728059435, 141.285059351339 43.0845891128115, 141.284583003628 43.084158269819, 141.28420281968 43.0838180465674, 141.283821420073 43.0834515795717, 141.283240821177 43.082908873707, 141.282901259869 43.082591495251, 141.283878090581 43.0820129133712, 141.284806142837 43.0828652524636)) ^^http://www.opengis.net/ont/geosparql#wktLiteral