メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.405877253161 43.7471159782147, 142.406574202435 43.7470787325773, 142.406689168549 43.7480565714789, 142.405971269908 43.7480988040118, 142.404360024088 43.748192631625, 142.402649244394 43.748288520418, 142.402607670519 43.7478068547002, 142.402547190399 43.7472998468422, 142.404247217851 43.7472156837286, 142.405877253161 43.7471159782147)) ^^http://www.opengis.net/ont/geosparql#wktLiteral