メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.101917510274 43.8197586860367, 144.101161864363 43.8199955437582, 144.101032340905 43.8197767355544, 144.100298359989 43.8199982577824, 144.099619560135 43.8188371355833, 144.100427386088 43.8185920050495, 144.1010814442 43.8183618259726, 144.101110114551 43.8184095835468, 144.10141426375 43.818917791488, 144.101917510274 43.8197586860367)) ^^http://www.opengis.net/ont/geosparql#wktLiteral