メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.099230895356 43.8210447015804, 144.099533910969 43.8215476580831, 144.099032069685 43.8217076785297, 144.098542770269 43.8218587915614, 144.098100046011 43.8219896353545, 144.097528925667 43.8221583827951, 144.097307522051 43.8218259260088, 144.09717370741 43.8216250966301, 144.096867686908 43.8210996974702, 144.096834874598 43.8210434983051, 144.097876416928 43.8207291901352, 144.098869643412 43.8204294902427, 144.098917260881 43.8205121880539, 144.099230895356 43.8210447015804)) ^^http://www.opengis.net/ont/geosparql#wktLiteral