メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.618200550076 43.3024124989338, 144.612494691816 43.3033774238152, 144.612439200585 43.3033916508147, 144.612205438244 43.303457031464, 144.611412388141 43.3016179357556, 144.61340016946 43.3011812786312, 144.616306194975 43.3006029352906, 144.618200550076 43.3024124989338)) ^^http://www.opengis.net/ont/geosparql#wktLiteral