Contour Line Elevation

Dear friends,

I have an issue that I have been trying to solve for almost 3 days using the Pix4D. The issue is elevation values in the contour lines, all of them are negative values. Any ideas what may have gone wrong or did I missed anything? I’m pasting a screenshot from the ArcGIS view. 

Your help is highly appreciated.

 

i’ve used the following information for my step 3 process…

Hi Benedict

Could you share the quality report? It would give more information about your project