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How to use orography from DataForWind in WAsP using GlobalMapper

by José Miguel Jáuregui

  1. Extract the DEM in ASCII XYZ format
  2. Opening XYZ files using Global Mapper:
  • Open Global Mapper.
  • Choose File | Open generic ASCII text files
  • Select Generic ASCII text file import options | Import type | Elevation grid from 3point data
  • Select Generic ASCII text file import options | Treat 3rd coordinate value as elevation
  • Inspect the map for voids (undefined values), spikes and wells. Remove any of these problems by editing height overlay options (Tools | Control center… options)
  1. Change the coordinate system to UTM (If needed):
  • Choose Tools | Configure | Projection
  • Projection: UTM
  • Zone: Zone being studied
  • Datum: Coordinate system
  • Apply
  1. Make a contour map in Global Mapper:
  • Create a new contour map in Global Mapper using XYZ files
  • Choose File | Generate contours
  • Choose the appropriate contour levels in the Contour generation menu options
  • Export the height contours to a 3D AutoCAD DXF file from the File | Export vector data | Export DXF
  • In DXF Export options tick Generate zero width lines
  • To select the part of the map to export, DXF Export options | Export bounds

The result is a DXF file that can be easily open by WAsP Map Editor

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