メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.427716950546 43.7603581377232, 142.427758213833 43.7608341914114, 142.426999587951 43.7608906459694, 142.425617550109 43.7609935062668, 142.424930602944 43.7610446165803, 142.424822734244 43.760031086814, 142.425520008205 43.7599908085617, 142.426907060728 43.759910654752, 142.427674320161 43.7598663180259, 142.427716950546 43.7603581377232)) ^^http://www.opengis.net/ont/geosparql#wktLiteral