メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.832644957041 43.0856404772541, 142.832454862751 43.0856194328985, 142.832197343192 43.0855204533414, 142.831903600194 43.0852084873935, 142.831799678101 43.0850710989026, 142.831559952344 43.0850472817959, 142.831372063901 43.0850208086202, 142.831705841248 43.0841944876074, 142.832074077553 43.0842422659034, 142.832571683668 43.0843482504667, 142.832806812664 43.0843983935655, 142.833701051929 43.0846217704879, 142.833305104247 43.0848950555949, 142.832971751895 43.0852783680321, 142.832644957041 43.0856404772541)) ^^http://www.opengis.net/ont/geosparql#wktLiteral