メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.375580300794 43.7378335031858, 142.37587582317 43.7379213812734, 142.376201090901 43.7380181038452, 142.375755092256 43.7387999502664, 142.375295066327 43.7395694508202, 142.374035301777 43.7392084122558, 142.374454166243 43.7384047143059, 142.374460566338 43.7383924532435, 142.374912216429 43.7376347969361, 142.375580300794 43.7378335031858)) ^^http://www.opengis.net/ont/geosparql#wktLiteral