1. I have a digital elevation model (DEM) with a point location defined.

  2. I want to locate the lowest height values at a set distance from this point.

  3. I envisaged creating a buffer around the point and then locating the lowest height values; firstly is this the best way of achieving this, if not can you recommend another option ?

  4. If it is the best way, once the buffer is created around the point, how do I extract DEM cells with the lowest height values? I dont want to know what their values are, I want to be able to identify the cells and know where the cells are.

Thanks for any assistance you can provide.

  • 2
    What software do you plan on using for this? if you don't have any specific software in mind, edit your question to say so and you'll have folks also suggest software too (probably free/open source) in any answers. Oct 31, 2012 at 12:49
  • 1
    Do you want "at a set distance" or "within a set distance"?
    – BradHards
    Oct 31, 2012 at 12:51
  • 1
    Sorry Im using ArcMap 10 Oct 31, 2012 at 13:19
  • 1
    Within a max distance Oct 31, 2012 at 13:20

1 Answer 1


I think you can create a buffer, then clip your DEM to this buffer (see this or this), and then this clipped DEM circle you can reclassify to show the lowest cells. Or just use Classified symbology in properties.

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