メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.390596065074 43.7821461505703, 142.390648719757 43.7822145627275, 142.390683888415 43.7822855290785, 142.390550788407 43.7822451140919, 142.390480701795 43.7822096865599, 142.390256395787 43.7820882302147, 142.390046678581 43.7822904679542, 142.389100687483 43.7816782050206, 142.390167191326 43.781365548182, 142.390596065074 43.7821461505703)) ^^http://www.opengis.net/ont/geosparql#wktLiteral