Under what circumstance it is necessary to conduct geodetic survey???

where the effects of the earth curvature are critical or when a high degree of accuracy is necessary to complete the particular project

Explanation:

Every construction object should be drawn or recorded on the cadastral plans because the object officially exists only when it is drawn in the cadastral plans.

surveying of underground lines is also a legal obligation, and at the same time a right and a need of investors, because only after drawing underground installations in the cadastre of lines can the ownership of the performed works be registered, as well as compensation in case of negligent damage.