I am trying to display the measurement tool on QGIS while I am adding a vector to a vector layer I created. I am using EPSG 4326 and I cannot figure out how to use the measurement tool while creating a vector. Currently I am doing research and I need to gather vectors that are 4km in length that showcase a fault line in the direct center, meaning I need to measure 2 km on each side of the fault line and represent it with a vector. I would like to be as accurate as possible and showing the measurement while creating the vector would help a lot. Is there a way to do this in QGIS?


1 Answer 1


The Advanced Digitizing Panel will probably be of use. You can show it with

View > Panels > Advanced Digitizing.

When your line layer is editable and you have Add Line Feature activated, you can then enable Advanced Digitizing with this button:

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Once you have begun your line by clicking the first vertex, you can use the enter image description here button to specify a fixed length for your line.

enter image description here

However, this won't work if your project and line layer are both in EPSG 4326. It will work if your project is in a projected coordinate system (UTM, or better yet, the local coordinate system) even if your line layer is not. That said, I would recommend working in a local coordinate system rather than EPSG 4326 wherever possible.

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