メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.971398067958 43.5381182278172, 144.971052612172 43.5378952503758, 144.971098485588 43.5378578384599, 144.97075934278 43.537633336868, 144.970715300489 43.5376040782709, 144.970280117326 43.5373159740758, 144.971329851634 43.5366248079799, 144.972399338347 43.5374927564598, 144.971864013458 43.5378271513478, 144.971398067958 43.5381182278172)) ^^http://www.opengis.net/ont/geosparql#wktLiteral