メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.91043364033 43.5028216426062, 141.910499147084 43.5030652366157, 141.91055732761 43.5032890112401, 141.909077052576 43.5035424513271, 141.909013294205 43.5034304780495, 141.908851765482 43.5030837790545, 141.908714808019 43.5027696092201, 141.908419414791 43.5016749075305, 141.908441362253 43.5016717729317, 141.909136089475 43.501558829277, 141.910017421629 43.5014155298306, 141.91043364033 43.5028216426062)) ^^http://www.opengis.net/ont/geosparql#wktLiteral