. 
tect the errors with the facilities of the computer for rapid 
changes of the digital data. It also has the advantage of allo- 
wing the operator immediately to judge the result of his manipu- 
lations. 
As sophisticated tool for the correction of errors in the digi- 
tal data population is not only required to achieve a clean, 
correct, and readable map image, but is necessary if the data 
shall serve as a data bank module for multiple uses and users. 
Furthermore, the updating of maps and the implementation of 
field checking data require the same editing functions as the 
correction of errors. Other interactive editing functions are 
used to develop statistical information from the cartographic 
data base. 
r Applications 
Photogrammetric Data Collection 
o with continuous digitizing mode and point to represent Topo- 
graphy and Morphology with directly measured contour lines 
and spot heights for 
- urban mapping, 
- registration of underground pipelines and cables (in towns 
and industrial areas), 
- town planning, 
- urban renewal, 
- road and railroad construction planning, 
- inventory, 
- engineering surveys, 
+ - agricultural and forestry purposes, 
- hydrographic engineering and water supply, 
- topographic mapping 1:5 000, 1:10 000, 1:25 000 or smaller 
scales, 
0 with point mode to determine coordinates within local refe- 
rence systems for 
- aerotriangulation, 
- digital terrain models, 
- boundary corners and topographic points for cadastre and 
reallotment, 
- profiles and cross sections. 
Cartographic Data Collection 
© 0 with continuous and point mode to digitize 
- available maps, 
- aerial photographs, rectifications, mosaics, 
- Other graphical products.