メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.397702571078 44.166447252673, 142.397310281596 44.1663825906609, 142.396135558231 44.1661934272375, 142.395411752112 44.1660804999731, 142.395781817915 44.1648398308707, 142.398086108414 44.1652359833056, 142.397702571078 44.166447252673)) ^^http://www.opengis.net/ont/geosparql#wktLiteral