Pit and Spike removal from DEM

KBlockerKBlocker Global Mapper UserPosts: 2
edited June 2012 in Elevation Data
Is there a process for individually removing pits and spikes from DEM that will not affect the surrounding terrain elevations?

Thank you

Comments

  • global_mapperglobal_mapper Administrator Posts: 17,238
    edited June 2012
    What you could do is right-click on the DEM layer in the Control Center and select to create points at the grid cell centers, then edit the elevations of those points in pits or spikes (or just delete those points), then right-click on the point layer in the Control Center and select to create an elevation grid from that. The pits and spikes should then be removed or modified based on your changes to the points.

    Let me know if I can be of further assistance.

    Thanks,

    Mike
    Global Mapper Guru
    gmsupport@bluemarblegeo.com
    http://www.globalmapper.com
  • KBlockerKBlocker Global Mapper User Posts: 2
    edited June 2012
    I have a rather large area to work on, is there a way to create the control points just in the area of the pits/spikes?
    forgive me if this seems like a rtfm moment.
  • global_mapperglobal_mapper Administrator Posts: 17,238
    edited June 2012
    There isn't really a way to automatically identify the pits and spikes. I suppose you could load the layer twice, then set one to use a resampling method like a box averager of an appropriate size, then use File->Combine Terrain to create a new difference layer and easily find those places where the terrain deviates significantly from the local average. Nothing really fool-proof though.

    Thanks,

    Mike
    Global Mapper Guru
    gmsupport@bluemarblegeo.com
    http://www.globalmapper.com
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