メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.315793348316 42.286108202843, 143.316367481908 42.2863486316355, 143.315865322779 42.2869950585096, 143.315828152837 42.2870435142838, 143.31526395649 42.2868084763284, 143.314561628412 42.2865159144053, 143.314598820174 42.2864630976525, 143.31512018801 42.2858260642514, 143.315793348316 42.286108202843)) ^^http://www.opengis.net/ont/geosparql#wktLiteral