メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.625932609727 34.9069660482112, 136.625055666485 34.9070298540114, 136.624999107301 34.9064399345622, 136.625884111931 34.9063859487276, 136.625894752229 34.9064693542858, 136.625932609727 34.9069660482112)) ^^http://www.opengis.net/ont/geosparql#wktLiteral