メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.900956356323 43.0983678824601, 142.897717918455 43.0978202992131, 142.89772813613 43.0977881007229, 142.898147366728 43.0965581183053, 142.89822683048 43.0962943529376, 142.898506053528 43.0953808024897, 142.901688702857 43.0959056127865, 142.901126741316 43.0977779701469, 142.900985178152 43.0982619423052, 142.900956356323 43.0983678824601)) ^^http://www.opengis.net/ont/geosparql#wktLiteral