メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.547811817288 43.2462926862357, 143.547244787859 43.2463157988926, 143.547292968476 43.2469261336525, 143.546698176893 43.2469288828124, 143.546601314074 43.2457246763588, 143.546411815016 43.2457394172684, 143.546357413614 43.2453159479612, 143.547725149191 43.2452478011196, 143.547811817288 43.2462926862357)) ^^http://www.opengis.net/ont/geosparql#wktLiteral