メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.399440292456 40.8272286703775, 140.400475635151 40.8281338230382, 140.395599695761 40.8348979771443, 140.389123959086 40.8402884603278, 140.379874382969 40.8394994752698, 140.380117910389 40.8373027011478, 140.377546701587 40.8360483198165, 140.376329545096 40.8354375241508, 140.378278662987 40.8331966965971, 140.382031344752 40.8288817512953, 140.388285038817 40.8214964779826, 140.399440292456 40.8272286703775)) ^^http://www.opengis.net/ont/geosparql#wktLiteral