I am wondering if anyone has any good pointers on extracting the coordinates of the lowest point within a given boundary/buffer zone in QGIS. I am able to use Join Attribute By Location (Summary) where I select the elevation cell as a minimum to get the lowest elevation within a region. However, I can't figure out a way to get the easting and northing coordinate as well. I have hundreds of points I am trying to extract so it's not feasible to go look through the initial point files and match the elevation with the coordinate. Does anyone have any tips on how I can somehow extract a coordinate with the lowest elevation within a given boundary/radius?

  • 3
    Could you please add a screenshot of the canvas to show us what the data look like?
    – ahmadhanb
    Oct 27, 2022 at 0:08
  • So you have buffer polygons and a elevation raster?
    – BERA
    Oct 27, 2022 at 5:39
  • I am trying to extract the lowest point from a point vector within each of the buffer zones shown in the photo above. Any suggestions would be greatly appreciated!! Oct 27, 2022 at 15:23
  • Actually I just found a solution! Thanks for enquiring though. I followed the last two steps from this post and used minimum in the expression instead of maximum and it worked great! gis.stackexchange.com/questions/294038/… Oct 27, 2022 at 16:52


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