メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.904319704234 43.0987072569192, 142.904199608716 43.0991005955239, 142.904168486062 43.0992015560791, 142.904134021211 43.099313296091, 142.903545343833 43.0992258614458, 142.903664553126 43.0988257067019, 142.900956356323 43.0983678824601, 142.900985178152 43.0982619423052, 142.901126741316 43.0977779701469, 142.901688702857 43.0959056127865, 142.90499903187 43.0964513357582, 142.904813906596 43.0970768548447, 142.904755825144 43.0972730559277, 142.904697743322 43.0974692569764, 142.904348917923 43.0986116518514, 142.904319704234 43.0987072569192)) ^^http://www.opengis.net/ont/geosparql#wktLiteral