メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.383532837333 43.0423357007294, 141.384003593145 43.0427476709002, 141.382829523227 43.0434666333868, 141.382360577825 43.0430555865585, 141.381869858001 43.0426183507197, 141.382700685033 43.0421155254989, 141.38304419139 43.041907628272, 141.383532837333 43.0423357007294)) ^^http://www.opengis.net/ont/geosparql#wktLiteral