メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.364913049286 43.8215639152419, 142.365415537707 43.8218503285393, 142.36590488603 43.8221579549479, 142.364870451959 43.8229195620898, 142.364370183535 43.8232756894619, 142.36387899466 43.8236356374998, 142.363335663695 43.824019685352, 142.362182597331 43.8233244462291, 142.362168918648 43.823333477688, 142.361702348901 43.823010149661, 142.362311811969 43.8225867897758, 142.363164372716 43.8219040549903, 142.363787354906 43.8214314655589, 142.364250744031 43.8211530478348, 142.364759200466 43.8214536799767, 142.36493534885 43.8215490556736, 142.364913049286 43.8215639152419)) ^^http://www.opengis.net/ont/geosparql#wktLiteral