メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.33877573853 43.8219482719712, 142.338466790116 43.822175099585, 142.338346746174 43.8220850571777, 142.33759002303 43.8215292713382, 142.337901893068 43.8213025851711, 142.338333801312 43.8216146386366, 142.338649185032 43.8218597119317, 142.33877573853 43.8219482719712)) ^^http://www.opengis.net/ont/geosparql#wktLiteral