Method and device for controlling the digging of an elongated excavation in a terrain.

The method involves determining limit values of movement of land. Sensors (C) to produce signals representing land movement are placed in holes made before digging. The holes are oriented to pass along and near an excavation path. The signals are transformed into values that are then compared with predetermined values. The compared result is transmitted to a driver of a digging machine for driving, correcting and stopping digging. Independent claims are also included for the following: (A) a device for controlling digging of an elongated excavation in a land (B) application of a method/device of controlling digging of an elongated excavation in a land.