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I have the DEM of the area I'm working in. I have geological faults as lines. I now want to create perpendicular topographic profiles to the faults at 800m distance.

Vince
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new_qgis_user
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    You'd have to split the line at distance then draw a perpendicular line https://gis.stackexchange.com/questions/380361/creating-perpendicular-lines-on-line-using-qgis, then to add topographic information to the transect https://gis.stackexchange.com/questions/357624/adding-z-column-for-z-values-from-draped-raster-using-qgis which should give your transects values from a raster DEM. Hope that helps. – Michael Stimson Mar 21 '23 at 06:48
  • Welcome to GIS SE. As a new user, please take the [Tour]. Questions here should not only state the task but also describe what you have attempted, and where you are stuck. – Vince Mar 21 '23 at 09:10

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