メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.252560957074 34.8150240786604, 137.25182337312 34.8153514335151, 137.250921880364 34.8157577860391, 137.250826087893 34.8156113552897, 137.250730380843 34.8155550784869, 137.25060736552 34.8155213599223, 137.250402107012 34.8152172391221, 137.250279028763 34.8151159050902, 137.250169647245 34.8150483688023, 137.250046622255 34.8150033807597, 137.249950947949 34.8149809113449, 137.249841747051 34.8149752147913, 137.251316747348 34.8142699545736, 137.251876738685 34.8139990785463, 137.252232526867 34.8145284722749, 137.252560957074 34.8150240786604)) ^^http://www.opengis.net/ont/geosparql#wktLiteral