REMOTE SENSING USED IN SMALL SCALE CARTOGRAPHY 
  
D. Danthine, Laboratoire de Géographie Régionale 
et de Télédétection, Catholic Uni- 
versity of Louvain. 
D. Ferier, National Geographical Institute (Belgium). 
C. Eugène, Laboratoire d'électrométrie et photo- 
métrie, Catholic University of Louvain. 
Delimitation of urban areas with the joint techniques of micro- 
densitometry and equidensities. 
  
  
The delimitation of densely built-up urban areas 
for the generalised map at the scale of 1:250.000 presents a lot 
of difficulties, considering that the 1:25.000 and 1:50.000 maps 
from which it usually derives have different dates of editing. 
The LANDSAT documents, and especially the photographs of the 
scale of 1:1.000.000 are a source of interesting data. It is pos- 
sible to take scientifical and technical advantage of these data 
by means of the use of a microdensitometer and of the technique 
of equidensities. 
Thus we have tried to work out at the "Laboratoire 
de Géographie Régionale et de Télédétection, directed by professor 
J. Wilmet of the University of Louvain. Our purpose was to mark 
out the boundaries of the densely built-up urban areas in order to 
help the National Geographical Institute in the redaction of 
1:250.000 maps.