メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.050765193179 42.9043741509479, 143.050782527262 42.9043755773766, 143.0514167811 42.9051324287239, 143.051306088948 42.9059589826603, 143.050559497462 42.9059029417186, 143.04982017498 42.9058541588806, 143.049849639879 42.9056395779508, 143.050000592091 42.9043148548514, 143.050765193179 42.9043741509479)) ^^http://www.opengis.net/ont/geosparql#wktLiteral