# Unwrapping problem relevant to SNAPHU

Hi. I try to get a DEM from Sentinel-1 by refering this video:

and the whole process I follow is on 11:07 https://youtu.be/7w_-deMSRTs?t=667 .

In this flowchart, unfortunately, I got a problem at unwrapping of 11:19 https://youtu.be/7w_-deMSRTs?t=679 .

I mean, although SnaphuExport was well done and I chose in SNAP