メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.357296561273 43.7809908774248, 142.35769831061 43.7811165297925, 142.358417242263 43.7813466906979, 142.357973146107 43.7820844378112, 142.357699417283 43.7826512388941, 142.35670166117 43.7819490303558, 142.356270329101 43.7816443785032, 142.355594840355 43.7811585749817, 142.355340902998 43.7809656362487, 142.355099344288 43.7804028595321, 142.355881024309 43.7802690384456, 142.356073818241 43.7808247932113, 142.356493060912 43.7807301642724, 142.357296561273 43.7809908774248)) ^^http://www.opengis.net/ont/geosparql#wktLiteral