メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.338932912832 43.7504958855855, 142.338631497272 43.7510065849902, 142.338624571306 43.7510184395169, 142.338343713332 43.7514994298006, 142.338230182304 43.7514687891593, 142.336810260344 43.7510357488392, 142.337096700832 43.7505538266186, 142.337257657591 43.7502880636965, 142.337406320901 43.7500312229634, 142.337694112611 43.7495482789215, 142.338956689775 43.7499348614063, 142.339226177966 43.7500188927573, 142.338932912832 43.7504958855855)) ^^http://www.opengis.net/ont/geosparql#wktLiteral