Need help opening a DEM file

I'm trying to work with a DEM file that is 11Gig in size. The height map of  mars. This file can be downloaded here. The height map when added to a 3D software will interpret the terrain of this map. However there seem to be a large degree of compression and that will interffere with the accuracy of the map.

This file should look like this:

But instead when oppend in PS looks like this and with way less resolution

I was told by someone I needed to enter this code in order to conver this file

Hi Marcos,

I think your software may be misinterpreting the data type of the pixels in the image. The label says this:

SAMPLE_TYPE                  = MSB_UNSIGNED_INTEGER

SAMPLE_BITS                  = 16

UNIT                         = METER

SCALING_FACTOR               = 0.25

OFFSET                       = -8000

Your help is appreciated!