メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.374620913646 43.7407733800421, 142.374427907918 43.7411254592832, 142.374191115016 43.7415441974384, 142.374000057369 43.7418716440809, 142.373384504171 43.7416869734169, 142.372705002512 43.7414878630583, 142.373120876192 43.7407358764002, 142.373321886834 43.7403953769394, 142.37355670121 43.7399809856473, 142.373566669136 43.739964905224, 142.374035301777 43.7392084122558, 142.375295066327 43.7395694508202, 142.374841769765 43.7403778119306, 142.374620913646 43.7407733800421)) ^^http://www.opengis.net/ont/geosparql#wktLiteral