メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.908442779556 43.526579390337, 141.908373928735 43.5265901192089, 141.907240380552 43.5226313285695, 141.908930972534 43.5223600113462, 141.909267364935 43.5234095739457, 141.910125240457 43.5263176022038, 141.908442779556 43.526579390337)) ^^http://www.opengis.net/ont/geosparql#wktLiteral