メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.782660305963 35.4124313834091, 136.780694236884 35.4124936371561, 136.780686467467 35.4122826709292, 136.779319179377 35.4123283519724, 136.779251946642 35.4121141683709, 136.78263036237 35.4119885253507, 136.782660305963 35.4124313834091)) ^^http://www.opengis.net/ont/geosparql#wktLiteral