メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.931120837728 43.807165880129, 141.931005161218 43.8077413437993, 141.929480148411 43.8075955222907, 141.929565945262 43.8070449585272, 141.929652296036 43.807021114588, 141.929997188059 43.8069258960996, 141.931237959262 43.8065833185764, 141.931120837728 43.807165880129)) ^^http://www.opengis.net/ont/geosparql#wktLiteral