メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.785548368986 35.0628750558787, 136.784310017886 35.0626915045612, 136.78152552762 35.0622521023056, 136.781505971096 35.0622490824773, 136.781728410346 35.0598000674568, 136.783055864693 35.0599009053947, 136.78417170001 35.0599897928083, 136.785837984568 35.0601231364302, 136.785548368986 35.0628750558787)) ^^http://www.opengis.net/ont/geosparql#wktLiteral