メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.455248297888 43.0087834088815, 141.455461226018 43.0091005373166, 141.455665637769 43.0094019924791, 141.456028464674 43.0096848534355, 141.45499953185 43.0100499791846, 141.453860023591 43.0104610257869, 141.453583674654 43.0100571556559, 141.453545860561 43.0099945782395, 141.452943574674 43.0091353619255, 141.452903818987 43.0090711531305, 141.454713881917 43.007969965102, 141.454755418894 43.0080410069502, 141.454991582653 43.0083914939698, 141.455248297888 43.0087834088815)) ^^http://www.opengis.net/ont/geosparql#wktLiteral