メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.892052491041 43.009663022518, 142.891935281028 43.0097638286254, 142.891845457162 43.0098530880798, 142.891072413523 43.0092861933046, 142.891215696568 43.0091723015707, 142.892442270768 43.0080708894329, 142.892828440498 43.0089959553981, 142.892052491041 43.009663022518)) ^^http://www.opengis.net/ont/geosparql#wktLiteral