メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.696084647884 35.3397368435825, 136.696226067248 35.3407076863755, 136.695080916601 35.3408222247282, 136.694953932178 35.3398543957953, 136.694792170717 35.3388146698891, 136.695936362218 35.3387053392287, 136.696084647884 35.3397368435825)) ^^http://www.opengis.net/ont/geosparql#wktLiteral