Global Mapper v24.1

Can I create boundaries for slopes greater then wished?

Good evening,

I've tried to create areas with slopes greater than 10º, but there are some places that the poligon are too small (pixels). Do you know a way to reduce tht little areas and unify them?



  • bmg_mike
    bmg_mike Global Mapper Guru Moderator, Trusted User

    How are you trying to create the Slope Areas? If you have GM v23.0 (or later), I would suggest making the Slope Shader active, then using the Layer -> Vectorize Raster menu command and specifying the slope range that you wish to create polygons from. That dialog allows you to automatically ignore polygons below a certain size.

  • Thanks Mike, unfortunately my license (GM 23) doesnt include the pro version. I tried with Layer-> create area features from equal values but the result has too many little areas.

  • bmg_mike
    bmg_mike Global Mapper Guru Moderator, Trusted User
    Answer ✓

    You can kind of do this manually. Once everything is created, select all areas with the Digitizer Tool, then right-click and select Advanced Selection -> Select All Areas/Islands Smaller than Size. Then, specify the smallest size to keep. What remains selected should be smaller than that. You can just press Delete to mark them as deleted.