I have several large shapefiles from various sources. All cover various sections of oceans and many overlaps, as such the coastline is repeated across the several shapefiles but to varying levels of details/accuracy.

The outcome I would like to achieve is one shapefile, with one coastline.

I can merge the shapefiles in QGIS but how would I align the coastline and drop its duplication?

  • 1
    Maybe it can be done with Differences and Unions. Also, you can try the snap tool of GRASS v.clean algorithm. The solution to your problem will be more or less handmade and specific according to your source data. – Gabriel De Luca Dec 7 '19 at 22:26

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