メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.366512155862 43.8205534363567, 142.367330274444 43.8211160106671, 142.366946601036 43.8213945721454, 142.366486002634 43.8216977691713, 142.36590488603 43.8221579549479, 142.365415537707 43.8218503285393, 142.364913049286 43.8215639152419, 142.36493534885 43.8215490556736, 142.364759200466 43.8214536799767, 142.364250744031 43.8211530478348, 142.364857785156 43.8207210084572, 142.365738408714 43.8200961371293, 142.365826063092 43.8200201717877, 142.366512155862 43.8205534363567)) ^^http://www.opengis.net/ont/geosparql#wktLiteral