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 Import Surface
This function allows you to import a DEM as a USGS Surface Mesh. Select a surface mesh in the file browsing menu and click select surface mesh. The new DEM, once loaded, will appear in the Survey List. Large DEMs may take a long time to load.
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 Save Surface
Selecting Save Surface from the Surface Menu, or by right-clicking on the surface, exports an XYZ ascii file of the surface. Default surfaces are flat so only the four corners will be exported, but height maps and any other surface maps will have XYZ values for each node. These surfaces are saved in the main project directory using the name of the surface with the file extension .llh.
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