メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.3820679722 43.7718777433437, 142.38024904432 43.7715951586992, 142.379543055677 43.7704783221844, 142.379203407285 43.76993936664, 142.380754186648 43.7695221265555, 142.381491374568 43.7708439452217, 142.3820679722 43.7718777433437)) ^^http://www.opengis.net/ont/geosparql#wktLiteral