Identification of spring water collection for the city of Gramat
Ceiling of the cave room
Location completed for the society Ginger Environnement, in preparation for a drilling.
The transmitter was positionned at the red point. The drilling arrived at the green circle 1,5 m further. The drilling deviation
was estimated by another society at 1% for a 124 m deep drill, so it was of 1,24 m and the accuracy of the determination of the better drilling point on surface area was of 30 cm, in other words of 0,2%.
