メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.316521157656 43.0625839718317, 141.316214102647 43.0627245853008, 141.315686644213 43.0623277742772, 141.315757473089 43.0620283287902, 141.315891250131 43.0620425731017, 141.316206826501 43.0620858691542, 141.316378190435 43.062107311656, 141.316692607291 43.062157560031, 141.316521157656 43.0625839718317)) ^^http://www.opengis.net/ont/geosparql#wktLiteral