メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.230398280937 43.1370323050808, 141.229008779746 43.1371167503929, 141.228643764069 43.1371389494363, 141.228292204518 43.1371603529364, 141.227550190678 43.1360497806629, 141.227700597293 43.1358871908221, 141.226500816331 43.133672296915, 141.225568299978 43.1320366887876, 141.228007474762 43.1320839713739, 141.230814462034 43.1321299093002, 141.231112943278 43.1331521213585, 141.23135579051 43.13388183241, 141.231608538122 43.1348196627936, 141.231728790586 43.1352525497383, 141.23185199074 43.135675757685, 141.232175317569 43.1368702757515, 141.231835059894 43.1369169693078, 141.230398280937 43.1370323050808)) ^^http://www.opengis.net/ont/geosparql#wktLiteral