メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.367054428136 43.773481270172, 142.367351489256 43.7740243430299, 142.365819782554 43.7744782261996, 142.365516105003 43.7739213384483, 142.365314094612 43.7735322243748, 142.365234169291 43.7733946499033, 142.366771850405 43.7729545850822, 142.366942142398 43.7732430641858, 142.367054428136 43.773481270172)) ^^http://www.opengis.net/ont/geosparql#wktLiteral