メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.604848296863 43.299171791429, 144.604531266176 43.2992349324232, 144.604959826727 43.2985495921023, 144.605364098224 43.29790363844, 144.605634160581 43.2979906190652, 144.6060275877 43.2988928474064, 144.60491250579 43.299159005262, 144.604848296863 43.299171791429)) ^^http://www.opengis.net/ont/geosparql#wktLiteral