メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.770039507769 42.9031277981926, 140.770990141269 42.9030744191664, 140.771028557752 42.9030722436795, 140.771121853087 42.9040999202116, 140.771250048961 42.9040842076329, 140.771298970257 42.9041908980853, 140.771133662317 42.904230253782, 140.771255042414 42.9055679562871, 140.770241234784 42.9056090580999, 140.77024525426 42.905629013251, 140.769013998713 42.905689020998, 140.768922806979 42.9046067221004, 140.768854169256 42.9041328606758, 140.768772711365 42.903183611309, 140.768816875544 42.9031811599773, 140.770039507769 42.9031277981926)) ^^http://www.opengis.net/ont/geosparql#wktLiteral