メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.009262196443 36.7377168339048, 137.009010468207 36.7377356522292, 137.008995763162 36.7375936921066, 137.009289553387 36.7375757746677, 137.009262196443 36.7377168339048)) ^^http://www.opengis.net/ont/geosparql#wktLiteral