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Using NED files in DEM Earth

Is it possible to use the new NED format that the USGS is utilizing for the National Map Viewer in DEM Earth?  


I have downloaded several NED files of the area I would like to import into DEM Earth.  They offer ArcGrid, GridFloat and IMG folders for download at 1/3 arc second.  Just wondering if anyone has any experience with this and if so, what process have you used to convert these files for use with DEM Earth.


Thanks,


Randy Mills


Best Answer
yes, you can use these files.
if you have a GIS application, convert to asc, geographic  with datum WGS84.

In global Mapper

  1. Load the segment in to global mapper
  2. Select the layer you just loaded in.
  3. open the configuration window, Tools/Configure
  4. choose the Projection Tab
  5. Change the projection to Geographic(lattitude/longitude)
  6. Change the Datum to WGS84
  7. Close the configuration window

now save as asc

  1. File/Exporte Elevation Grid format
  2. Choose - Arc ASCII Grid
  3. hit OK
  4. save the file.


In DEM Earth (1.35 or greater)

  1. Create a DemEarth Object
  2. Go to Tab, Object/Location/DataSet
  3. Press the "Embed ASC file" button
  4. Select the asc file you previousy saved from Global Mapper.
  5. DEM Earth loads in the file and centers the location on the middle of the embeded region.









 


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Answer
yes, you can use these files.
if you have a GIS application, convert to asc, geographic  with datum WGS84.

In global Mapper

  1. Load the segment in to global mapper
  2. Select the layer you just loaded in.
  3. open the configuration window, Tools/Configure
  4. choose the Projection Tab
  5. Change the projection to Geographic(lattitude/longitude)
  6. Change the Datum to WGS84
  7. Close the configuration window

now save as asc

  1. File/Exporte Elevation Grid format
  2. Choose - Arc ASCII Grid
  3. hit OK
  4. save the file.


In DEM Earth (1.35 or greater)

  1. Create a DemEarth Object
  2. Go to Tab, Object/Location/DataSet
  3. Press the "Embed ASC file" button
  4. Select the asc file you previousy saved from Global Mapper.
  5. DEM Earth loads in the file and centers the location on the middle of the embeded region.









 

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