Table 2 
Time and costs involved In the orthophotomap of a 1:5000 
Item 
kS 
Type of work 
Time 
/in days/ 
Cost 
/in D.M./ 
1 
Photoflight with planning and 
acceptance /1:13000} f*15 cm; 
0.3 
130.- 
2 
size 23x23 cm, overlap 90%/ 
Determination of ground oontrol 
/aerialtriangulation by indepen 
dent model/ 
a/ horizontal position 
1.5 
400.- 
b/ horizontal position and eleva 
tion 
2.5 
800*- 
3 
Terrestrial determination of ver 
tical control points 
5.0 
1500.- 
4 
Orthoprojection /1:10000; AX « 
2 mm; wilhout orientation data/ 
a/ Profiling > 
1.0 
450.- 
b/ Exposure run /two orthophotos/ 
on GZ-1 with interpolation 
0.4 
250.- 
5 
Orthoprcjection and recording of 
dropped line or contour lines 
/1:5000; AX=4 mm; without 
orientation data/ 
a/ Profiling 
1.2 
650.- 
b/ Exposure run /two orthophotos/ 
on GZ-1 with interpolation 
0.4 
280.- 
6 
Type seting and montage of border 
and lettering 
1.0 
—a 
0 
. 
1 
7 
Construction of contours from 
A R 
500.- 
dropped lines 
8 
Stereoploting of contours . 
4.0 
1600.- 
9 
Scribing of contour sheet 
4.0 
500.- 
10 
Composite print 
‘ 0.3 
120.- 
The above mentioned data are taken from the experience of several 
years map production at 1i5000 scale in North Rhine-Westphalia. 
Photomaps compiled by the conventional rectification and by 
the orthoprojection are in this region a part of the base map 
series* It is not intended there to replace the line map with 
th^ photomap, particularly in- the densely built up areas. 
The results shown in Table 2 are also confirmed by Voss [5J • 
At the University of Mining and Metallurgy In Cracow similar 
comparison took place, when the Polish Base Map at 1:2000 scale 
was analysed /without contour lines/* For one map sheet /1,6 
square kilometer/ of the region near Cracow the production time 
using Zeiss -Jena Topocart and Orthophot was 24 hours and with 
the stereoplotting technique 130 hours* The time - consuming 
ratio in this case Is 1:6,2* The cost ratio is similar. 
106