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Is it possible to carry out vector editing functions in QGIS? In this case I have an imported shapefile of contour lines. I wish to be able to create a copy of a line, in-situ, trim it, then create a number of offsets at a specific spacing. In short, basic CAD tasks.

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  • Welcome to gis.stackexchange! Please note that a good question on this site is expected to show some degree of research on your part, i.e. what you have tried and - if applicable - code so far. For more info, you can check our faq. – underdark Mar 2 '17 at 19:21
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You can install QAD plugin which does exactly what you want. It has trimming, extending, and other interesting tool like simple CAD, as you can see below:

enter image description here

This is the only tutorial I found of QAD Plugin, but unfortunately it is not in English. But I think you can still follow because the commands are in English.

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  • Awesome, any tutorials you know about? Thanks, N – ensta Mar 2 '17 at 17:23
  • I updated my answer. – ahmadhanb Mar 2 '17 at 19:19
  • Yeah, spotted that one. However my Italian not so great. Thanks – ensta Mar 2 '17 at 21:43
  • If you are familiar with AutoCAD, it will be easy to understand the process. I had experience working with AutoCAD software before that's why I found it very useful. – ahmadhanb Mar 3 '17 at 6:01
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The Advanced Digitizing Panel has tools that will be of use for you. I use it to start a predefined point, move at a specified distance and angle to my point of beginning then begin digitizing from there specifying line lengths and angles. Here's a video tutorial for more information on the panel and the related trace tool:

https://www.youtube.com/watch?v=QsjmLa16obs

These tools became part of the standard installation as of QGIS 2.8.

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