Multiline string to Linestring

If the vertices of the endpoints of the lines are not on exactly the same location, the LineCombiner will not connect them. You can try to fix this using the Snapper transformer upstream of the LineCombiner.

great Idea but the problem still here!

In the linecombiner, you group by the attribute idchemin, so all 3 lines have the same attribute? Just checking. Can you upload an FFS with the 3 lines? Difficult to say what is wrong from printscreens.

Yes it's the same.

I uploaded a FFS, thank you for your help

I now better understand your issue. The line is self intersecting, creating 3 parts due to the self intersect. I do not have a solution now but someone else probably has.

Yes the self intersecting create 3 parts. I Would like to know if it's possible to "force" the line ,don't create the 3 parts, still have just one line?

If somebody has an idea ... 😊

Thank you @panda​ , it works!

@panda​ 

your script works fine in a one way but how to do in a round trip. I tried and this is the result

Do You know a way to do this?

thank you

Do you mind provide me the .ffs for those feature please.

Here you will find a line which is in fact two compiled lines (the forward and the return)

Thank you for your help

So I personally never deal with road network before. The way I do it may be wrong. But I think the issue is at this location.I'm wondering if you can fix these verticies manually. I'm not quite sure how to remove some of these verticies in FME without spend couple more hours on it. I remove some of the verticies in the middle and move each of the line end vertex to make it connect without intersect each other. I'm not sure if this is the acceptable way to make road network. But this way it fixed the multipart line and turn it into single line with the same exact workspace i provided before.

I'm agree with you, it requests hours and manuel work to get a perfect network.

Thank for your help.

Let me know if the way I fix it is how it is supposed to be? When I have free time, I'll work on this. I imagine I will eventually run into this issue at some point.