Lack of precision?

Take a look at this power lines not aligned…


Power lines are very unlikely to line up, even if the ground is perfectly aligned.

They are so narrow that in most cases the stitching algorithms will not identify their location in 3D space, and simply assume they are part of the texture of the grass in the image.

Also as they are higher up your overlap is likely to be much lower, meaning they appear in fewer images than the ground below.

In summary, mapping the actual power lines is a huge challenge, but the ground below them and elevation is likely very accurate assuming you have decent GPS, high overlap% and if you need <1m precision: ground control.

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