In ArcGIS Desktop there is an option called "Hatching features in a layer".

This option shows a symbol in the definition of the layer every x meters, and shows wich distance of the line is this point. The only requirement is that it has to be a PolylineZM. You don't need to find a feature each x meters.

I have seen that in QGIS you can show an element every x meters, but it does not indicate what meter of the line you are on.

This is the option in ArcGIS Desktop:

Option in ArcGis

This is the result:

enter image description here

You can configure how often the symbol is seen depending on the zoom:

enter image description here

I have managed to display the x and y coordinates of each point on the line. But I don't know how to show coordinate m . There is an option called "m" but it gives null value

enter image description here

This is the option:

enter image description here

In this post of Anita Graser is part of solution:


In this example she shows the time that is saved in M-Coordinate.

In my M-Coordinate I have the kilometers of the track, so now I can show the kilometers of the track.

But now the problem is how can I Show only, for example 0 km, 10 km, 20km,....

I have this code:

if(round(m(end_point(  geometry_n($geometry,@geometry_part_num))),1) % 10=0,'Km: ' || round(m(end_point(  geometry_n($geometry,@geometry_part_num))) ,1),'')

And this is what I see:

enter image description here

There are a lot of labels in all kilometers, except km 50. Km 60 don't appear.

the values of M are:

For km 10:

9.971457994611619, 10.010272669243294, 10.049427736851628, 10.078717827986582, 10.134048260383972

For km 50:

49.89965861361227, 49.955282766127425, 50.13697156278586, 50.227182220927844

For km 60:

59.649021204083134, 59.90137352805058, 60.451925034363654, 60.49149744738719, 60.53553518812927

Any idea to resolve this?

Now I'm speaking with Anita Graser in this link:


Here is my LineStringZM geometry:


Here is a part of my code to calculate M coordinate:


Here is the original GPX track:


I discover another function, that creates a point in a distance (10km for example):


enter image description here

If you create for 20km, 30km,… you can have every 10km, but if you want for each km I think it’s a lot of work.

enter image description here

Is possible to create a bucle for do this?

Or how I call the function “pointsalonglines” from Geometry Generator? I do the answer in another post:

How to use a Processing Algorithm in a expression function used in a Geometry Generator

1 Answer 1


With the help of Anita Graser and @ThomasG77 I have the solution.

In Symbology we create a symbology Rule-Based.

enter image description here

Select Option Geometry Generator, select generate a Point, and in expresion insert this code of ThomasG77, to generate a Point Every 25km:

generate_series(0, length($geometry),step:=25000),
  x(line_interpolate_point($geometry, @element)),
  y(line_interpolate_point($geometry, @element)),

And if you work with a GPX Track that is in Geodesic coordinates, @ThomasG77 give me this other code:

    length(transform($geometry,'EPSG:4326', 'EPSG:25831')),step:=25000), 
    x(line_interpolate_point(transform($geometry,'EPSG:4326', 'EPSG:25831'), @element)),
    y(line_interpolate_point(transform($geometry, 'EPSG:4326', 'EPSG:25831'), @element)),
     @element), 'EPSG:25831', 'EPSG:4326')

enter image description here

Now to show the KM (every 25km), create a Font Marker, and in the expresion put this:


You also can create a Picture with Km and select create a SVG Marker and the name of the file is km number and in name of file svg Maker put expresion like this:

to_string((@geometry_part_num-1)*25) || '.svg'

enter image description here

Here is the final result Font Marker:

With marker Option

And this with SVG Marker:

With SVG Marker

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.