メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.741073569188 35.3364261710419, 136.73952224158 35.336704049778, 136.738896238238 35.3360368014722, 136.740868560803 35.3356506078127, 136.741073569188 35.3364261710419)) ^^http://www.opengis.net/ont/geosparql#wktLiteral