Global Mapper Pro

Orthophoto to Roughness

yigit
yigit Global Mapper User
edited June 2012 in Technical Support
Hey,

I have orthophotos regarding the area I am working on. I would like to get roughness lengths from GM by using this input. Is it possible? When I click on roughness tab I do not actually get anything. Does GM have the ability to give roughness lengths automatically? Could you pls help me?

Thanks in advance,

Yigit

Comments

  • global_mapper
    global_mapper Administrator
    edited June 2012
    Yigit,

    You would need to have land cover data loaded to generate roughness lengths using a defined table of land cover types to roughness lengths. There are several built-in mappings for land cover types to roughness lengths for common land cover databases (like CORINE and NLCD, both of which are available using the File->Download Online Imagery/Data menu command). You can't generate roughness values just from imagery though.

    Thanks,

    Mike
    Global Mapper Guru
    gmsupport@bluemarblegeo.com
    http://www.globalmapper.com
  • yigit
    yigit Global Mapper User
    edited June 2012
    Hey Mike,

    Thank you very much for your useful and quick answer. Support of yours is exactly perfect. I downloaded Corine and now have roughness for my terrain. Thank you again..

    Yigit
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