メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.039673206947 42.9177211495231, 143.039670245293 42.9177476147665, 143.038948169607 42.9176925192926, 143.038956695557 42.9176444232899, 143.039092049925 42.9166061651043, 143.039825334328 42.9166632918541, 143.039679192602 42.917702821532, 143.039673206947 42.9177211495231)) ^^http://www.opengis.net/ont/geosparql#wktLiteral