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I have a line layer and a vector grid. Now I want to count the lines in each raster. First I split the lines by intersecting the line layer with the vector grid.

Second, I need to do a multipart to singlepart for the lines because I want to count each line individually.

Now here is the problem: The lines are intersecting itself and at every intersection, the multipart-to-singlepart tool makes new parts of the lines.

How can I avoid this, are there other workarounds?

A picture als explanation:

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  • "a vector raster" what is it ? Commented Oct 10, 2017 at 13:18
  • Sorry, wrong translation, I meant Vector grid (Vector -> research Tools -> Vector grid)
    – Martin
    Commented Oct 10, 2017 at 13:40
  • How many features do you need to do this for?
    – whyzar
    Commented Oct 10, 2017 at 14:21
  • The vector grid is built by 378 polygons. I have more than 100 lines (not all of them with self-intersection), after intersecting them with the vector grid there are more than 2000. And after executing multipart-to-singlepart more than 3000....
    – Martin
    Commented Oct 11, 2017 at 7:36

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