メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.758999852332 43.2073733671894, 141.758281030169 43.2081459662466, 141.757781792473 43.2078889511779, 141.757433938827 43.2077098767632, 141.757311284013 43.2076467552557, 141.758056891109 43.2068918963589, 141.758512440473 43.2071229110672, 141.759003926403 43.2073689880784, 141.758999852332 43.2073733671894)) ^^http://www.opengis.net/ont/geosparql#wktLiteral