メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.746255634891 43.15834103794, 141.746272358107 43.158480577579, 141.74631347311 43.1587852205408, 141.745468068821 43.158839933744, 141.745416933248 43.1584108322719, 141.745407271619 43.1583297685987, 141.745334306749 43.1577807252205, 141.746182048753 43.1577265158982, 141.746255634891 43.15834103794)) ^^http://www.opengis.net/ont/geosparql#wktLiteral