メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.405688804974 43.7450333987685, 142.406385534023 43.7449997948239, 142.406480973019 43.7460426733351, 142.405776918292 43.7460711193702, 142.404156440119 43.7461597876914, 142.402451580073 43.7462548550925, 142.402415745019 43.7458878597865, 142.402392006282 43.7457064792122, 142.402373029368 43.745571802918, 142.402350931728 43.7452145466816, 142.404058636265 43.7451157138325, 142.405688804974 43.7450333987685)) ^^http://www.opengis.net/ont/geosparql#wktLiteral