What technical problems will modern surveying and mapping technology encounter in construction? Please give one or two examples if you can. Thank you!

During construction, the laid points will be destroyed, and some projects are inconvenient to lead these points to the side.

The GPS signal will be blocked by high-rise buildings and tunnels and cannot be measured.

Photogrammetry is sometimes used for deformation monitoring. When it is occluded, the data of these occluded parts must be removed.

The B-level control network measured by GPS is sometimes not as accurate as the trilateration network measured by precision rangefinder.