メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.343410697353 43.0916419485062, 141.344197144075 43.091756489235, 141.344069763692 43.0921952452188, 141.343933947361 43.0927503984318, 141.343531866088 43.0926848990706, 141.343174354158 43.0926360681399, 141.342369760396 43.0925345274882, 141.342482944974 43.0921481967144, 141.342633534185 43.0915422448442, 141.343410697353 43.0916419485062)) ^^http://www.opengis.net/ont/geosparql#wktLiteral