メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.925817332776 35.4100702301723, 136.92768530483 35.4100816262149, 136.927376929126 35.4104340975244, 136.927061548347 35.4107917647478, 136.92580376647 35.4107906639027, 136.923750261946 35.4107780895106, 136.923747823067 35.4104126795104, 136.923746710578 35.4100566373656, 136.923744925772 35.4093268780958, 136.924550182927 35.4093311748143, 136.925108966807 35.4093327189403, 136.925817332776 35.4100702301723)) ^^http://www.opengis.net/ont/geosparql#wktLiteral