Tuesday 22 August 2017

qgis - How to get the center line between two linestrings


Where is the track of a ship when it is shipping always in the center of the English Channel between the coasts of Great Britain and France?



  1. I started with 2 linestrings and I created a lot of points on the linestring with a postgis query.

  2. After that I created a distance matrix with Raster/Analysis/Proximity in QGIS.

  3. Finally I created an aspect raster from the output raster.


enter image description here


Is the red line really the "center line" between these two linestrings?



Is there a more efficient way to do this?




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