Hi everybody, I've got a project with no control points (sorry, my total station was not with me). I ran a first aerotriangulation and it seemed to work so far. Can someone please tell me the diference between the positionning levels results : georefrenced ( which I know should be the typical workflow, absolute and relative) ? My block is positionned "absolute". I want to make an axis constraint: a wall edge on a building will be my Z axis. I set 2 user tie points ( pointing in 4 photos for each of them) which by the way I don't undeerstand the color code (blue- yellow - green lines). In the constraint definition, for a constraint axis I'm able to define point A and B for the Z axis but a message at the bottom says : " Invalid positionning constraint. Undefiened user tie point " Is my workflow possible ? Am I missing something ? Rgds. Fabrice
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