メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.365245498909 43.7756078405861, 142.366435468764 43.7759859309686, 142.366467427256 43.7765854936442, 142.366213558999 43.7766582490706, 142.365546098114 43.7764575144107, 142.3648618522 43.7762440652423, 142.364514621198 43.7761331416895, 142.364137844364 43.7760105204843, 142.364514168969 43.7753928185382, 142.364627712513 43.7754302590778, 142.364678366391 43.775446961905, 142.365245498909 43.7756078405861)) ^^http://www.opengis.net/ont/geosparql#wktLiteral