Making middle point going on curve lines in QGIS

Question

I've these lines so when i want to point the middle by going to Vector > Geometry Tools > Centroid the point goes on the Straight line only, but when i have lines with curves the point doesn't goes with the line as you can see in the image.

How can i make the middle point going on the curve lines?

Lots of options https://gis.stackexchange.com/questions/58079/finding-middle-point-midpoint-of-line-in-qgis — Mapperz, Jun 21 '22 at 13:01
Can you provide a geometry WKT (and the coordinate system) of one curved line where the centroid doesn't fit in the middle line ? Maybe try to generate geometry from expression with line_interpolate_point($geometry, length($geometry) / 2) https://docs.qgis.org/3.22/en/docs/user_manual/expressions/functions_list.html?#line-interpolate-point — J. Monticolo, Jun 21 '22 at 13:46
Are you trying to find the point that divides each line segment into two equal length parts? — Spacedman, Jun 21 '22 at 13:49
wkt_geom id length_m LineString (14.4355352909697352 27.02017888747414531, 14.43499962884913757 27.02049135606148411, 14.43467536561014164 27.02009050742625007, 14.43510964655483875 27.0198349007725902, 14.43485023517483512 27.01944410804897956) 0 235 — Abdullah Muthanna, Jun 21 '22 at 13:55

score 4 · Answer 1 · edited Jun 21 '22 at 13:59

4

Use the "Interpolate point on line" tool from the Processing Toolbox (Ctrl+Alt+T):

Choose your line layer, and then find "Edit" in the dropdown for Distance:

Enter $length / 2 as the expression.

Halfway-points appear:

edited Jun 21 '22 at 13:59

Taras

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answered Jun 21 '22 at 13:55

Spacedman

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After clicking run no point shows in the lines idk why !! – Abdullah Muthanna Jun 21 '22 at 13:58
i don't know why there is no dot's only the new layer shows after clicking on run any solution ? – Abdullah Muthanna Jun 21 '22 at 15:25
1

Is it creating a new layer? – Spacedman Jun 21 '22 at 21:47
yes but without points – Abdullah Muthanna Jul 02 '22 at 12:30
any help !!!!!! – Abdullah Muthanna Jul 05 '22 at 10:13
@AbdullahMuthanna can you supply sample data? Edit your question with a link – Spacedman Jul 05 '22 at 12:28

Making middle point going on curve lines in QGIS

1 Answers1