Various questions on ATCOR-4

[jomiles]

This DEM is in geographic coordinates (Geographic Long/Lat), wheraes ATCOR requires metric coordinates; you'd need to convert the DEM to UTM before it can be used in ATCOR. Such a conversion is to be done externally, e.g. in ENVI.

Thank you for your help.

Hopefully my last question for you: what does this error message relate to? I am atmospherically correcting a rugged terrain.