メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.876548581402 43.0138480012456, 142.875758032681 43.0133702103691, 142.875587632679 43.0132619188152, 142.875510413875 43.0132128282282, 142.87644866948 43.012402226125, 142.876926743545 43.012730372233, 142.877416025188 43.0130296203266, 142.877466624336 43.0130622571399, 142.87730833579 43.0131975223413, 142.876660301549 43.0137511102816, 142.876548581402 43.0138480012456)) ^^http://www.opengis.net/ont/geosparql#wktLiteral