メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.033562931687 43.5654713769809, 142.034384898352 43.5655294130699, 142.034285189493 43.5662541772756, 142.034179343145 43.5668895465854, 142.03327322241 43.5668219278859, 142.03241586528 43.5667468674762, 142.032511334839 43.5660047944367, 142.032511598193 43.565931691397, 142.032568817594 43.5654038639517, 142.033245765097 43.5654519356011, 142.033562931687 43.5654713769809)) ^^http://www.opengis.net/ont/geosparql#wktLiteral