メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.257635289267 34.8196407165225, 137.258059481797 34.8201813277781, 137.25810083903 34.8205193808524, 137.258128386641 34.8207222105973, 137.257295023488 34.8209482380103, 137.257267620711 34.8208806419781, 137.257226576188 34.8208355952932, 137.257007724263 34.8206441805193, 137.256816204392 34.8204527447307, 137.256802360946 34.8202837130669, 137.25673377257 34.8200358365734, 137.256815511183 34.8197878457996, 137.256869967856 34.8195849534396, 137.257635289267 34.8196407165225)) ^^http://www.opengis.net/ont/geosparql#wktLiteral