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Conclusions. 
Globally, one may affirm that the applied method 
and techniques have allowed to approach the problem of generali- 
zation:at the scale of 1:250.000 from a new point of view. They 
have yielded good results that can be used in the redaction of 
small scale maps. 
However, three remarks have to be made. 
This proceeding, as all cartographic techniques, 
entails the checking of the results by referring to the maps or 
photographs. : 
On the other hand, owing to the variable climatic 
conditions, the towns do not appear with the same density level 
even though they have a similar structure, and, a same town can 
have different density levels on two different photographs. But 
this is true for every magnetic or photographic recording. 
As far as cartographic techniques are concerned, 
the symbols utilized for the redaction of a 1:250.000 map invol- 
ve the exageration of some conventional signs such as the roads, 
which implies the removal of flat tints representing the built- 
up areas situated along the axes of communication. Consequently 
in most cases the results on film cannot be used as such. 
We may however conclude that, considering the nu- 
merous difficulties encountered in conventional and classic ge- 
neralization, the use of LANDSAT photographs represents an ap- 
preciable new source of information. The method and the techni- 
ques yield results that have an interesting normative. value 
after been adapted to the proceeding of cartographic redaction. 
Moreover they are an interesting source of useful references 
because of the diversity of the base documents generally used 
(photographs and maps at different scales dating from differents 
periods). 
But we must point out that the use of photographs 
has its limits, whatever methods are applied, for they represent 
a considerable loss of information in comparison whith the ori- 
ginal magnetic tapes. The use of these tapes would enable us to 
solve much more rigorously the problem of the delimitation of 
ground occupations and this the more efficiently as the resolu- 
tion increases in the future. Nevertheless, the RBV photographs 
of the satellite LANDSAT 3 that give a resolution of 40 m will 
probably enable us to produce by densitometry, documents of 
greater accuracy.