In my previous question I've asked how to can I merge different polygons while converting to GeoJSON and TopoJSON.
After a day of researching I've realized that, rather trying to do it command line, I should use some editor which can handle Shapefile data. So, I've choose QGIS.
I've toggled to edit mode, chose all areas needed and called "merge selected features". After the merge I'm getting something like this:
I'm expecting to get all countries in Africa joined into one region. But, as you can see, I'm getting some dangling paths. My question is - what I'm doing wrong, how I can avoid such dangling paths or get rid of them after the merge? Since selecting all this nodes via "Node tool" does not help much.