メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.370577384915 43.0836954620483, 141.370854412584 43.0837274796731, 141.371172101062 43.0837678269768, 141.371009610183 43.0844345622791, 141.370900557564 43.0849139294885, 141.369740708665 43.0847523321741, 141.369166658778 43.0846701326774, 141.369341917848 43.0839641847848, 141.369407505456 43.0837532105911, 141.36945688956 43.0835344455233, 141.370001664146 43.083616629857, 141.370577384915 43.0836954620483)) ^^http://www.opengis.net/ont/geosparql#wktLiteral