メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.438260329424 43.7983948976331, 142.440350437559 43.7996879154333, 142.4377280868 43.8018609793796, 142.437703982635 43.8018832576403, 142.435968996074 43.8007623172801, 142.435683996774 43.8005781742449, 142.43543891806 43.8004198262352, 142.436659189919 43.7994041056653, 142.438037319646 43.7982569284077, 142.438260329424 43.7983948976331)) ^^http://www.opengis.net/ont/geosparql#wktLiteral