メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.88483529239 35.2418698348886, 136.884799031214 35.2418679886998, 136.883623033383 35.2418062173467, 136.883333971498 35.2417689878294, 136.88327265841 35.2378743337973, 136.884769247458 35.2378733381009, 136.88483529239 35.2418698348886)) ^^http://www.opengis.net/ont/geosparql#wktLiteral