メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.367042658186 43.7671292772809, 142.367356029764 43.7676897172603, 142.365838907536 43.7681330485257, 142.365521851137 43.7675673177583, 142.3651904009 43.7669760564936, 142.36607457646 43.7667163847372, 142.366712032228 43.7665378606215, 142.367042658186 43.7671292772809)) ^^http://www.opengis.net/ont/geosparql#wktLiteral