メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.420415043487 43.7871705356029, 142.420770698693 43.7873957790178, 142.421613275447 43.7879201178505, 142.422669862485 43.7885749671138, 142.422205764871 43.7889668580451, 142.421813266789 43.7892848390403, 142.421303357162 43.7897076822767, 142.420249397325 43.7890464035603, 142.419680611949 43.7886877544322, 142.419382038542 43.7884960373202, 142.419070057535 43.788307556915, 142.418705822673 43.7880813882157, 142.420035650676 43.7869340915216, 142.420415043487 43.7871705356029)) ^^http://www.opengis.net/ont/geosparql#wktLiteral