Urban Accuracy assessment

I have produce coherence and amplitude of Sentinel-1 on SLC product. Create a threshold to produce a urban mask. I also have GUF(Global Urban Footprint) for comparing my results. But confused how to do accuracy assessment using GUF.

Kindly guide me

This issue is already discussed in this thread, I think there is no need to open multiple thread by the same member,

objective accuracy assessment Source of the thread