メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.429025381257 43.7946035264365, 142.429534964751 43.7949310979077, 142.430077634958 43.7952345853114, 142.428806448673 43.7962676580122, 142.4282996427 43.7959420833415, 142.427825993777 43.7956124640107, 142.427305380248 43.7952928998259, 142.426823496169 43.7949813080256, 142.428026545132 43.7939674146465, 142.428524130982 43.7942859412804, 142.429025381257 43.7946035264365)) ^^http://www.opengis.net/ont/geosparql#wktLiteral