Specifications

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2. The point has been marked inaccurately in one or more photographs. Review all
markings on all photographs of the questionable point. Zoom in an make sure point has been
marked correctly.
3. The point has been marked on only two photographs.
If a point is marked on only two photographs (which you would have determined in step 1
above) it will not be as accurate as if it were marked in three or more. Try to find the same
physical point in other photographs in the project to mark and reference it there or add more
photographs to the project and mark all visible points on the new photographs.
4. The point has a poor angle maximum (lower than 10 degrees).
Point Audit will show you if the point in question has a low angle maximum (i.e. the rays of light
from the point to the images it appears on are too close together to get an accurate position in
3D). To fix this, the point must be marked and referenced on another photograph that is from a
quite different view than the current photographs it is marked on.
5. There are too many points which are imaged on just two or three photographs.
The Audit Dialog shows how many points have only two rays. If there are too many of these
(over half the total points) then overall the model could be quite inaccurate. Try to add
photographs to the project so more points are marked on three or more photographs.
6. There are sets of photographs that share many points between themselves but share few
points with other sets of photographs in the project.
A careful review of the project through point audit will show if there are groups of photographs
that share common points but do not share many of these points with other photographs in the
project. When some photographs share few points with other photographs in the project, they
become disassociated and form a little model unto themselves. In other words, the points
shared by the set of photographs could be quite accurate internally but might be in the wrong
location or orientation relative to other parts of the complete 3D model.