メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.410738311287 43.7817940066269, 142.409876232203 43.782522104781, 142.409361706044 43.7821889230902, 142.408842457912 43.7818800957377, 142.40836404247 43.7815799129262, 142.407777450144 43.7812155139494, 142.408467066666 43.7806059297245, 142.409502029964 43.780233997334, 142.409757700358 43.7803850488453, 142.410532037291 43.7809508819366, 142.411207700896 43.7814107834789, 142.410738311287 43.7817940066269)) ^^http://www.opengis.net/ont/geosparql#wktLiteral