DMP is less feasible when the required accuracy is very high and/or when 
the terrain relief has changed. 
From this list of properties, however, it follows that DMP is a potential 
alternative to updating by means of orthophotographs. It represents a 
supplementary photogrammetric technique to stereomapping, it meets the 
requirements of an up-to-date data base system, and it may contribute to 
gradual transition from graphical to digital data bases. 
ACKNOWLEDGMENTS 
The author wishes to express appreciation and thanks to Dipl.-Ing. Dr. 
K. Tempili, for his critical comments. 
REFERENCES 
Allam, M.M. 1980, A review of data acquisition systems - present and 
future - and their effect on cartographic information systems, ISP Con 
gress, Commission IV, Hamburg. 
Beotra, l.m. 1981, Topographic map revision by digital monoplotting, 
ITC, M.Sc. thesis, Enschede. 
Beseniiar, J. 1976, Digital restitution from single photographs for ca 
dastral purposes, ITC, M.Sc. thesis, Enschede. 
Case, J.B. 1980, Automation in pliotogrammetry, ISP Congress, Commission II, 
Hamburg. 
Kolbl, 0., Pradervand, J.C. 1980, Interactive digital stereoplotting for 
the renovation of cadastral survey, ISP Congress, Commission IV, Hamburg. 
Makarovid, B. 1973, Digital mono plotters, ITC-Journal, 1973-4, Enschede. 
Masry, S.E., McLaren, R. 1977, Digital techniques for map revision and 
detecting errors in digitised data, UNB, Department of Surveying Engi 
neering, Technical report no. 40, Fredericton. 
Radwan, M.M., Makarovifi, B. 1980, Digital mono plotting system - improve 
ments and tests, ITC-Journal, 1980-3, Enschede. 
442