How to read .dem (digital elevation model) file in gh?

Hi

I am making 3d topography models off either an image or contour curves.

However I am wondering just to get a more accurate model if there is a way to import dem (digital elevation model file which is basically a image(tiff) file with elevation data included) file into gh and get it to read.

It looks like there is a dem file reader written in C#. (https://dem.codeplex.com/)

Yet I am curious if I could extract elevation data off the file directly in gh.

dem file: https://en.wikipedia.org/wiki/USGS_DEM

Thank you.