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I have a line layer for arrows in QGIS 3, and I'd like to display a marker at the end of each arrow. I tried to add a marker line on top of my arrow with a marker placed only on the last vertex, but it overlaps with the end arrow.

I suppose the ideal way would be somehow to define that I want to display my arrow line at eg 0.8 length, but not sure how to do that. A simple line visualization has a trim options, but there is nothing like that for an arrow line, and I cannot make a simple line curved.

This is how it looks now.

enter image description here

I would like to avoid the visible overlap.

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  • Don't understand how your result should look like. Please post a screenshot showing what you want to achieve.
    – Babel
    Apr 23 at 9:38
  • This is how it looks like currently: link I'd like to avoid the overlap of a marker on the last vertex and the arrow.
    – Jeremy
    Apr 23 at 10:34
  • You should add this image to your initial question by clicking edit... So the marker (dot) should be under the arrow, is that correct?
    – Babel
    Apr 23 at 10:40

1 Answer 1

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Move the symbol layer containing the point symbol below the line representing the arrow:

enter image description here

To avoid overlap at all and to make the arrow-line shorter, you can set the symbol layer type to geometry generator and use this expression, where 0.98 represents an end-point at 98% of the total line's length from the start point:

line_substring (
    $geometry, 
    0, 
    $length*0.98)

This, however, results in the arrow not pointing to the real end point any more as the end-point of the initial line in fact is shifted:

initial line dotted in black, arrow in blue enter image description here

To overcome this, change the expression for geometry generator to:

line_substring (
    smooth($geometry, 1),
    0,
    $length*0.95)

enter image description here

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4
  • Hi, thank you for the answer. I tried to set it up exactly as you described, but my arrow is far from the point. Any idea what am I doing wrong? link I also tried to set it up to 1, the arrow moves a little bit closer, but not much. $lenght*1 Setting it up to 1.25 looks alright, but is it a right approach? I though value 1 is the full length of the line.
    – Jeremy
    Apr 23 at 14:04
  • Try lenght($geometry) instead. Better? What CRS is your layer in?
    – Babel
    Apr 23 at 14:34
  • Can you share project+sample data for testing
    – Babel
    Apr 23 at 14:35
  • 1
    I'm using WGS 84 / Pseudo-Mercator EPSG:3857. I tried to create a new project, same layer and CRS, and it works as it should. No idea, but it's on my side. Thanks for the help!
    – Jeremy
    Apr 23 at 15:17

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