メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.380392180987 42.9966875764369, 144.38044046775 42.9966930768757, 144.381256267389 42.9968399753235, 144.380929982416 42.9978546419439, 144.38014341845 42.9977168308089, 144.380163138463 42.9976554176415, 144.380090335819 42.9976391222638, 144.379420081386 42.9975233317417, 144.379724747058 42.9965587949991, 144.380392180987 42.9966875764369)) ^^http://www.opengis.net/ont/geosparql#wktLiteral