メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.775918006311 35.698137780938, 139.775932813593 35.6984994269853, 139.775386725858 35.698518108883, 139.77538034767 35.6981717467628, 139.77536966751 35.6975912393737, 139.775898389186 35.6975914935064, 139.775918006311 35.698137780938)) ^^http://www.opengis.net/ont/geosparql#wktLiteral