ten E a 
v 
2.3. Terrestrial photogrammetric takings with phototheodolite Wild 
P30, from position A Fig.3,of the opposite of the river slope 
(fig.7y)y-and of the close slopes of the road with stereocamera Wild 
C120. (Fig.9). 
Measurements with stereo comparator (Wild STK1), use of suitable 
equations and extraction of coordinates of slope's points. 
3. CONCLUSICNS - DISCUSSION 
The methodology that was used is commented as follow : 
3.1. The photo-interpretation study is considered of decisive 
importance. 
A primary study about torrents that fall in river bed from on both 
sides slopes as well as about steep inclinations of these slopes, 
is possible to take place effectively at this step. 
Geomorphological, geological and other information is possible to 
CO-estimate and contribute to forming aspects for the most appro- 
priate combination of the methods. 
3.2. Relatively to the photogrammetric study : 
3.2.1. Plotting of alignement details and contour lines gives 
important information at different degree of details , always 
combined with the scale used. 
Study requirements at functional unities with often increased de- 
tails as well as special geomorphology (steep inclinations) limit, 
from some point of view,the contribution of these elements. 
3.2.2. Cross and longitudinal sections based on information direc- 
tly from the instrument at regular distance and characteristic 
points, contribute significantly, in spite of others (completion 
of alignement and altitude information etc.), to every relative 
technical study. 
3.2.3. Furthermore detailed study offers additional information, 
especially useful in critical areas, because of the relation with 
technical works. It is also useful in sensitive areas bécause of 
the advanced erosion. 
3.3. We extract much information,qualitative and metrical,from ter- 
restrial takings. Especially : 
3.3.1. The measurements are possible to concern the relief in gene- 
996 
  
pe irae bo | 
Fig.