メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.377039054932 43.7629164551967, 142.377045740568 43.7629288064421, 142.377342756165 43.7634645581571, 142.376545465983 43.7636913436733, 142.375849660022 43.763916746408, 142.375555576953 43.7633801616579, 142.375546236354 43.7633631362167, 142.375238709489 43.7628388888629, 142.376754716495 43.7623908493797, 142.377039054932 43.7629164551967)) ^^http://www.opengis.net/ont/geosparql#wktLiteral