メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.180034695445 36.61570121582, 138.180135119297 36.6164869546007, 138.179346669871 36.6160169068346, 138.178445962935 36.6154452348976, 138.177754665729 36.6149890267397, 138.176587322301 36.6142303862587, 138.175865537195 36.6137555635851, 138.176552326737 36.6130835552179, 138.176568046207 36.613068177986, 138.178387594299 36.6129519351506, 138.179774303268 36.612853299423, 138.179925588651 36.6145060350741, 138.180034695445 36.61570121582)) ^^http://www.opengis.net/ont/geosparql#wktLiteral