メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.103189689163 43.8204902841222, 144.102492793978 43.8207050833178, 144.102455624162 43.8206400788336, 144.101917510274 43.8197586860367, 144.103278856334 43.8193359625674, 144.103854894941 43.8202183326864, 144.103795237356 43.8202363366925, 144.103828086175 43.8202935180221, 144.103189689163 43.8204902841222)) ^^http://www.opengis.net/ont/geosparql#wktLiteral