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I'm looking for a method to add perpendicular lines at points along a polyline. Essentially I'm searching for a solution in QGIS or Python (I'm aware of an ArcGIS solution available here: http://www.arcgis.com/home/item.html?id=3f05ef15203e4a3ca88fc1d92347512b.

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A similar question (How to add a perpendicular line to the start & end nodes of every polyline?) addresses what I'm looking to achieve, but again, I need a QGIS/Python solution.

Does anybody have any advice? Currently I'm using the QChainage plugin to generate equally spaced points across lines (see below), but can't find a method to generate perpendicular lines from the points.

enter image description here

Sam Comber
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  • Don't forget to take the [Tour]. For questions that involve code we ask that you show us where you are stuck with your own code by including a code snippet in your question. There is an [edit] button beneath your question which will enable you to do that and a {} button that enables you to format any highlighted code nicely. – PolyGeo Jul 04 '18 at 21:15
  • Did you end up figuring this out? I happen to have a similar problem... – user32882 Jul 25 '18 at 08:46
  • @user32882 No I did not, please let me know if you find a solution – Sam Comber Jul 25 '18 at 10:46
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    I'm looking into v.transects https://grass.osgeo.org/grass74/manuals/addons/v.transects.html. Also take a look at my recent post in StackExchange https://gis.stackexchange.com/questions/290595/where-is-the-v-transects-algorithm-in-qgis and https://gis.stackexchange.com/questions/290568/dividing-a-buffer-into-segments-based-on-path-and-distance. Really it is quite surprising that v.transects cannot be found anywhere! – user32882 Jul 25 '18 at 10:56

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