メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.243479408119 35.2368781202806, 136.243407890084 35.2368730510918, 136.243451051863 35.2365383777821, 136.24346772022 35.2364865824252, 136.243554020571 35.2365123272613, 136.243760292184 35.2365636091734, 136.243479408119 35.2368781202806)) ^^http://www.opengis.net/ont/geosparql#wktLiteral