メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.380949622666 43.7541720727557, 142.380957988769 43.7542258604942, 142.381035600205 43.7546348669562, 142.381055846414 43.7547478508142, 142.37972051111 43.7551325989226, 142.379451827953 43.7546129791436, 142.379354975821 43.7545759402585, 142.379097699433 43.754068683466, 142.37918753249 43.7540406646497, 142.38082457433 43.7535594328091, 142.380949622666 43.7541720727557)) ^^http://www.opengis.net/ont/geosparql#wktLiteral