メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.836992702409 43.2584182335487, 141.836824944242 43.2584239608213, 141.836704826453 43.2583857630058, 141.836219958145 43.2579304026351, 141.832140630124 43.2541496863151, 141.831227105175 43.2533825132882, 141.830351175099 43.2526569652137, 141.827850037433 43.2504483401655, 141.82554651099 43.2484458142663, 141.825025042754 43.2484134249336, 141.835930072119 43.2449327363692, 141.840665782629 43.2499925240463, 141.839814084541 43.2504058911319, 141.841325057233 43.2520396015731, 141.839541449235 43.2530453234747, 141.839519160195 43.2531477120804, 141.840831688104 43.2545127459441, 141.841189775777 43.2550068774134, 141.836992702409 43.2584182335487)) ^^http://www.opengis.net/ont/geosparql#wktLiteral