メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.051573528687 43.566956500728, 142.050148593216 43.5673111923533, 142.048777838389 43.5672109307975, 142.047264907596 43.5676797407159, 142.047284400288 43.5674287554314, 142.047456503572 43.5665437573399, 142.047571665243 43.5665553535469, 142.048503445502 43.5666407906517, 142.048885557971 43.5666871738446, 142.049442412865 43.5667429693327, 142.051573528687 43.566956500728)) ^^http://www.opengis.net/ont/geosparql#wktLiteral