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I have a linguistic map of the Caucasus and I need to geotrace the languages that are on the map, preferably in QGIS.

Is there any way in which I can do it easily?

Here is the map:

enter image description here

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Save your map as something like png or jpeg that you can later bring into QGIS. Use the georeferencer plugin tool to georeference the map in QGIS. It helps to start with a background map of the area you are interested in QGIS, Open Street Map for example. There is a tutorial by Steven Bernard that does a great job of explaining the process here.

After importing the image and geo-referencing, you can digitize(trace) the boundaries of the language regions and create polygons.

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