メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.353921387791 34.7497564135531, 137.353652805866 34.750152214941, 137.353390824836 34.7500396488886, 137.353473753238 34.7499483863611, 137.353674178353 34.7496484734951, 137.353921387791 34.7497564135531)) ^^http://www.opengis.net/ont/geosparql#wktLiteral