@@ -31,7 +31,7 @@ covered by two bounding boxes (center at 599505,4921010 and
<h2>NOTES</h2>
-If no vector features are selected or the flag <b>-t</b> is
+If no vector features are selected or the flag <b>-b</b> is
used, topology is not build at the end.
<h2>USAGE</h2>