メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.450786756545 43.0515059446217, 141.450800275263 43.05153571892, 141.450862840586 43.051547408839, 141.450773288791 43.0516901180271, 141.448772048921 43.0520338239515, 141.448628350731 43.0516132949707, 141.448490265961 43.0511742369704, 141.448349300561 43.0507391683363, 141.448957185176 43.0506332165754, 141.44981552508 43.0504849860859, 141.450423467904 43.0503926004293, 141.450786756545 43.0515059446217)) ^^http://www.opengis.net/ont/geosparql#wktLiteral