メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.04186816231 42.9114330292407, 143.042962008292 42.9115156392751, 143.042809041211 42.9126335704872, 143.041734389585 42.9125606726769, 143.040431015079 42.912454597509, 143.040583662835 42.9113458143958, 143.04186816231 42.9114330292407)) ^^http://www.opengis.net/ont/geosparql#wktLiteral