メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.742587354999 35.4327940734998, 136.740756033515 35.4332392571278, 136.740581950124 35.4327452921027, 136.741098956719 35.4326638796164, 136.741727287215 35.4325679647057, 136.742114564012 35.4325077816938, 136.742452721453 35.4324536568989, 136.742981728638 35.4323886169154, 136.742587354999 35.4327940734998)) ^^http://www.opengis.net/ont/geosparql#wktLiteral