メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.839370865927 43.0804276247265, 142.839939901575 43.0805502962997, 142.840079852874 43.0805815034187, 142.839643657466 43.0816442635393, 142.839504517291 43.0816128411192, 142.838908349851 43.0814783507929, 142.838809740579 43.081456072737, 142.838251892766 43.0813301729283, 142.838447719974 43.0808538729075, 142.83863596384 43.0807732896227, 142.838818894341 43.0803183656666, 142.838874463462 43.0803301052917, 142.83925948123 43.0804035836727, 142.839370865927 43.0804276247265)) ^^http://www.opengis.net/ont/geosparql#wktLiteral