メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.322920003365 43.0553108826989, 141.322952857208 43.0553152899805, 141.323328980546 43.0553657477575, 141.323300007908 43.055493723181, 141.323273190902 43.0556120810765, 141.323249175013 43.0556846768163, 141.323121460022 43.0562488073523, 141.321761993784 43.0560571765301, 141.32196929986 43.0551832606134, 141.322260738085 43.0552226183328, 141.322631312755 43.0552704731648, 141.322677402461 43.0552764245839, 141.322920003365 43.0553108826989)) ^^http://www.opengis.net/ont/geosparql#wktLiteral