UAV photos look reversed after align (canon 1400sd)

[marce002]

Hello

1* Im taking vertical photos from 100mt with an UAV , when I do aligment the pre-model is presented from a bottom view (from the wrong side, from inside the eground!!) and almost black, and the camera positions are "in the other half of the world", is this normal?

2* Also tried to align 2 chunks, when aligned them, the models where aligned wrong, the pictures of the 2nd chunk where from 180degrees respect to the 1st (from underneath)
what is wrong?
thanks in advance!!!

[JMR]

1 yes it is normal... or let's better say it is the way it happens. I find it weird too
2 Not normal at all. Help Pscan with three or more pass-points (shared markers between chunks).

[marce002]

but... JMR how can I "share" markers? shold i pick one photo from the first chunk, locate a common point in the second chunk and then ?