How to create DEM and orthomosaic that are exactly coincidental?

[ChrisC]

I have an area where I created a DEM and orthomosaic but when I zoom way in on the pixels I see there is a slight shift (less than a pixel). I need to be able to overlay these products so that a pixel in the DEM is completey coincident with an underlying pixel in the orthomosaic. I have tried several different settings but shifting occurs no matter what. I would think they should be spot on considering they generated from the same source.  Is there something I'm missing?

[Alexey Pasumansky]

Hello ChrisC,

Are you observing the same effect, if the orthomosaic gneeration resolution is set as a same value used for the DEM?

Also how you are checking that shift?

[ChrisC]

Hi Alexey, thanks for responding.

Yes, I am using the same resolution. I Build the DEM from the mesh using the default resolution (0.00135878 m)
Then I build the orthomosaic, click the Metres... button and enter in the same resolution (0.00135878 m)
The created DEM and Orthomosaic both have same resolution (1.36 mm/pix) and the pixel sizes are exactly the same.

I checked for the shift by zooming all the way in and visually checking for difference on screen, double clicking the mosaic and then double clicking the DEM. Thats where I see the shift, less than a pixel. 

[ChrisC]

Alexey, do you have any suggestions about this? Thanks!

[ChrisC]

Anyone have any ideas about this?