メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.39808229626 44.1832249991645, 142.397314064124 44.1830946913198, 142.397410651486 44.1827472943466, 142.397693850428 44.1818375462152, 142.398463434801 44.1819538200317, 142.398269467628 44.1825996450093, 142.39808229626 44.1832249991645)) ^^http://www.opengis.net/ont/geosparql#wktLiteral