I have downloaded the Elevation Geotiff, and imported it into Arc (following the instructions from DD)
When I use 3D analyst tools/raster surface to create contours, it will only contour down to what I assume is zero elevation from the geotiff. As I am trying to map a small open pit mine, I need the pit contours.
I can see the detail in the geotiff that I need, But i cant get Arc to contour it.
I have tried various different settings and different downloads from DD, but nothing makes a difference.