349 
n function of the 
i/ey. 
joints surveyed, 
r an arrow. 
Jtruments. The 
*TK (Real Time 
ide by a Master 
ertices of the 
mtenna (Rover) 
idence of the 
ntre but known, 
jal visibility of at 
ig the day at our 
:ed by a radio- 
iver to calculate 
he global datum 
¡distant courses 
s for remaining 
r ater quarry 
course in the 
o the directions 
ime with GPS. 
a position fixed 
:a of the depth 
on of the echo 
3nd. 
/ed in the case 
network. The Software Surfer has been used to build the programme to manage the DTM in the studio areas to 
DTM (ver. 6.01 Golden Software) through Kriging allow the control in the time of the variation of volume, 
standard interpolation. On the DTM are obtained the 
contour line (2m equidistant) to describe the orographic 
shape of the terrain. 
The choice of a regular grid allows to compare the 
variation in the time of the height. It has been defined a 
mssrosr— 
Fig. 9. Contour line representation of a quarry (Cernusco sul Naviglio) 
jAfoo ' ""tSSSSSB* 
asse 
ater. 
)lume 
been obtained 
nterpolating the 
0.000 surveyed 
j.000 points for 
ed interpolating 
ar grid or a TIN 
3. GIS technology to support the management of 
the data during the time 
A GIS has been realized due to manage the data using 
Arcinfo (ESR!) on NT platform: through the ASCII. *.txt, 
V files, with the 3D co-ordinate of the points, using the 
TIN module it has been built on the DTM the 3D model to 
support the valuation of the volumes and the analysis of 
the variation in the time in function of the subsequent 
surveys at the different temporal phases. A standard and 
appropriate methodology can become an agile real time 
instrument for the advancing of the extractive activity: GIS 
could be used by both public administration and private 
subject to of the work organization and of control in the 
time.