メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.308675536686 38.2381128726473, 140.308746797891 38.2388790354464, 140.308823619933 38.2396103094493, 140.308896933902 38.2404204045799, 140.30863186543 38.2404276677045, 140.307151972194 38.2405172011889, 140.306979512133 38.2397773321492, 140.306442255506 38.2398396825032, 140.306110716453 38.2384006882148, 140.306636752819 38.2382591709362, 140.307384222889 38.2380647238083, 140.308054174272 38.2378962505231, 140.308642902942 38.2377600725667, 140.308675536686 38.2381128726473)) ^^http://www.opengis.net/ont/geosparql#wktLiteral