メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.325379496062 43.7635271890285, 142.325805580571 43.7636604291145, 142.32523623548 43.7646141362798, 142.325157151456 43.7647462874448, 142.324735027169 43.7646187906491, 142.324104795813 43.7644210529518, 142.324397402604 43.7639441885917, 142.324761170432 43.7633380789488, 142.325379496062 43.7635271890285)) ^^http://www.opengis.net/ont/geosparql#wktLiteral