メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((128.1250000 26.6625000, 128.1312500 26.6625000, 128.1312500 26.6666667, 128.1250000 26.6666667, 128.1250000 26.6625000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral