メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.332412846814 43.0891624475282, 141.332368972469 43.08931815444, 141.332301986876 43.0896335338004, 141.332170134246 43.0901157741302, 141.330838055843 43.0899528763477, 141.330579773066 43.0899244955631, 141.330801736908 43.0891089211393, 141.330916916741 43.0885293537579, 141.332506281343 43.0887336291124, 141.332412846814 43.0891624475282)) ^^http://www.opengis.net/ont/geosparql#wktLiteral