Default DEM Resolution and Scale

[hornblende86]

I have been working on building a DEM using historical imagery. The model photoscan constructs appears in the model window to be of a decent spatial resolution and true to form (It is a mountain hillslope ).  But when I arrive at the step of constructing the DEM, the dialog box indicates the proposed DEM's resolution is 1.72322e-05 m/pix! My intuition suggests that this degree of resolution is impossible coming from aerial photos from the 1940's.

Furthermore, if I were to ignore this obvious error/issue and construct and export the DEM, the model has a range of elevations between 3047.96 m and 3047.95 m, and can only be viewed at a scale of 1:0.28

Which variables am I neglecting, and how are they distorting the DEM's true resolution and scale? 

Much Thanks

[stihl]

Which coordinate system are you using? If it's local and not georeferenced I can imagine this problem occuring.

When it's not scaled properly it also explains the weird altitude difference.

[Alexey Pasumansky]

Hello hornblende86,

My guess is that the camera positions are in WGS84, but in the Reference pane settings the system is set to Local Coordinates by default.

[hornblende86]

Thank you so much for your help Alexey and Stihl!

That seems to have remedied my issue.

[mrc]

Is there a document explaining each of the new Optimization options? I too have noticed that these are often seemingly randomly ticked when I do Optimize Cameras. Would love to be able to make an informed decision about which ones to tick.

I am capturing small objects ~1 litre volume using a turntable and macro DLSR.

Sorry - I am sure I added this to another thread.