メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.358412350438 37.2941157736213, 140.357316517123 37.2951056667532, 140.355461364759 37.2937930593297, 140.358332134294 37.2910484082725, 140.360358622756 37.2923557015194, 140.358412350438 37.2941157736213)) ^^http://www.opengis.net/ont/geosparql#wktLiteral