メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.401202874857 43.7882939313853, 142.401213408468 43.7882850567592, 142.401554029677 43.788495033321, 142.401885976639 43.7887092382075, 142.40221792914 43.7889197839579, 142.401040697456 43.789923018111, 142.401015770735 43.7899074398603, 142.400011262299 43.7892801571068, 142.398923125627 43.7886184953779, 142.400135781468 43.787612898936, 142.400183545088 43.7875667927133, 142.401018132577 43.7880501023883, 142.400945937924 43.7881171255951, 142.401202874857 43.7882939313853)) ^^http://www.opengis.net/ont/geosparql#wktLiteral