メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.775388929321 43.1578426152017, 140.775359158524 43.1578182502663, 140.77297988266 43.1558668378286, 140.773784946757 43.1552692424638, 140.774551439383 43.1547130594373, 140.775667722257 43.1538708537128, 140.777009815881 43.1528641618033, 140.77739293742 43.1525701276731, 140.77987784796 43.1543591533586, 140.778103786554 43.1557780019077, 140.775388929321 43.1578426152017)) ^^http://www.opengis.net/ont/geosparql#wktLiteral