メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.350900712085 43.0587953223085, 141.350745552403 43.0593712276657, 141.349191925469 43.0591647521829, 141.349334386762 43.0585859349891, 141.349481520384 43.0580022319098, 141.351051413292 43.0582290157754, 141.350900712085 43.0587953223085)) ^^http://www.opengis.net/ont/geosparql#wktLiteral