メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.352656619938 43.7861326029705, 142.353232659017 43.7865472971816, 142.35326960265 43.7865738982176, 142.352640995464 43.787028823153, 142.352511436388 43.7871225932427, 142.352416515336 43.7871934578399, 142.351808759384 43.7867587107729, 142.351976684851 43.7866290081168, 142.351696098286 43.7864165709367, 142.351122968293 43.7868443982672, 142.350320366286 43.7862693139866, 142.351591680619 43.785340188515, 142.352656619938 43.7861326029705)) ^^http://www.opengis.net/ont/geosparql#wktLiteral