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I have created many .gpx data with my Garmin device, but due to the amount of data, I have imported the mapping data from my device several times (also because I didn't want it to be lost).

As a result, I have now many double or even 6 times the same point (including tracks, which I displayed as points also, so that I have the elevation) after I saved all the gpx-files as shapefiles and then merged them.

Is there a way to automatically erase the duplicates with QGIS?

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4 Answers 4

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Try the mmqgis Plugin.

There, go to Modify -> delete duplicate geometries and select your layer.

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You can also use the v.clean tool under GRASS commands in the Processing Toolbox (Ctrl+Alt+T).

To remove duplicates, set the cleaning tool to rmdupl.

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You can use the QGIS built-in tool named "Delete duplicate geometries" under Processing Toolbox" > Vector general in the Processing Toolbox (Ctrl+Alt+T).

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Another solution is the SAGA's "Remove Duplicate Points" tool can be found under SAGA > Features - Points in the Processing Toolbox (Ctrl+Alt+T).

saga_tool

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