メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.3000000 35.3625000, 135.3062500 35.3625000, 135.3062500 35.3666667, 135.3000000 35.3666667, 135.3000000 35.3625000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral