メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.367318724116 43.7612748755009, 142.367647913162 43.76184595796, 142.367948577585 43.7623675475378, 142.366436909176 43.7628120302422, 142.366138262012 43.7622837976958, 142.365815939634 43.7617136765855, 142.365455731929 43.7610765292741, 142.365395500907 43.7609645324472, 142.366747972999 43.7605471307164, 142.366878093178 43.7605069717033, 142.366894863274 43.7605395377094, 142.367318724116 43.7612748755009)) ^^http://www.opengis.net/ont/geosparql#wktLiteral