メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.399235686842 44.1769589722218, 142.397974794436 44.1767674488401, 142.398215664708 44.175959042215, 142.399460023117 44.1761725245949, 142.399235686842 44.1769589722218)) ^^http://www.opengis.net/ont/geosparql#wktLiteral