メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.378826529924 43.786595824422, 142.379151844722 43.7870473549407, 142.37941035262 43.7873663845649, 142.376195808289 43.7884713168252, 142.376085378137 43.7883948035774, 142.375806187841 43.7882218319673, 142.375550788345 43.788063565421, 142.375078506565 43.7877145898494, 142.374872238651 43.7875734468341, 142.374641502988 43.787423942324, 142.378547177823 43.7862406538458, 142.378826529924 43.786595824422)) ^^http://www.opengis.net/ont/geosparql#wktLiteral