メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.658460183427 33.2506334769302, 131.659390336603 33.2507494718684, 131.659996012229 33.2508348399554, 131.66065042268 33.2509064621444, 131.660452695148 33.2521594711924, 131.659767435337 33.2520783980659, 131.658241776894 33.2518890455047, 131.656585410342 33.251676109807, 131.656714924189 33.2509575247993, 131.656800879135 33.2504230734106, 131.657620021641 33.2505270746586, 131.658460183427 33.2506334769302)) ^^http://www.opengis.net/ont/geosparql#wktLiteral