third coordinate 4 can Le carried out by fitting a juadratic sure 
tace on Lue vicinai Cata. points resulted from digital correlation. 
ty CUulpsalifg ibterpgOolatéoud Values with tne corresponding known 
Courdinales 4, Une accuracy Of tne LUM generated by SUDAFS can be 
evaluated, he accuracy statistics for four models are given in 
laule 5. all the nhob values in the Table are in meters. With the 
sume rule as accepted by ISPRS image correlation test /1/ the 
points were rejected if tneir residuals are larger than twice the 
Hiro Z value, 
Table 3. accuracy Evaluation for DEM 
  
H 
  
  
  
  
  
  
| Mode i rook points | RMor 2 Hejected points/RMSE 2 0/00 H 
1 1 3 0.64 2 0,23 0,15 | 
= 
2 10 0,89 0 0.89 0.42 
5 11 U.13 2 0.39 0.18 
4 11 0.85 2 0.20 Q.10 
average 0.21 
  
  
  
  
  
  
  
  
Two orthophoto map sreets in scale 1:2000 were produced on Wild 
avioplan UH 1 with these same protographs in scale 1:10000. The 
DEM generated from SO0DAMS in used exactly for orthophotoproduction. 
we have used wild A 10 to cneck the planimetric accuracy of these 
two ortnopnoto map sheets. The results are listed in Table 4. 
Table 4. Planimetric Accuracy on Orthophoto 
  
  
  
  
  
urthopnoto | Check points | RMSE X Y (mm) 
1 36 0.36 
2 39 0.18 
average 0.27 
  
  
  
  
4. CUNULUSIUN 
Unis paper has shown that the SUDAMS is a hopeful software package 
for off-line aisital automatic mapping system. The accuracy des- 
cribed in this paper has indicated that it is realy for collection 
of heisut data to generate digital elevation model. We are plan- 
ning to use tnis software package for practical orthophotoproduc- 
tion as soon as possible. 
An essential feature is tnat tnere is no special hardware to sup- 
port tnis system, which is written in FORTRAN. It is developed 
for modularity and transportability.In principle this software 
system can be easily run on any general purpose computer. Secondly, 
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