Hi Lukasz,
I recommend you this article:
How-to-map-and-measure-Pole-and-Tower-Structures
In addition, colleagues have noticed that disabling the “Multiscale” option gives better results:
When this option is enabled, the software will search for points in the user-defined image scale, but not only at this location. In case it does not find anything in this image, it will also look for points at a smaller image scale.
Consequently, if this option is disabled, fewer points will be generated, but they will be more accurate with less noise.
I can also recommend this article:
https://www.pix4d.com/blog/cell-tower-drone-inspection-antenna-mount/
Regarding, corridor mapping:
Corridor mapping
Number-and-distribution-of-ground-control-points-GCPs-in-corridor-mapping
Corridor-Project-has-Big-Errors-on-the-Edges
Number-and-distribution-of-GCPs-in-Corridor-Mapping-
Hope this will help.
Best