in pratice, we have to consider how 
to further proceed with them. 
Without doubt, the availability of new 
equipment, its efficiency and 
price/performance ratio will be 
decisive criteria as to whether 
- available equipment will be 
upgraded, or 
- new equipment will be purchased 
and the old one rejected. 
It is necessary to distinguish between 
9 the modernization of existing 
equipment, e. g. by the exchange of 
obsolete computers and software for 
new ones, or the replacement of 
mechanically connected drawing 
tables by electronically controlled 
plotters, and 
0 the complementation of existing 
equip-ment, e. g. the extension of the 
viewing system of stereoplotters by 
superimposition or a higher viewing 
magnification. 
2. Subject of upgrading 
2.1. Analog, opto-mechanical stereo- 
plotters 
This category of instruments, which 
were produced approximately 
between 1965 and 1985, includes 
among others: 
Stereometrograph, Topocart: Zeiss- 
Jena 
Planimat, Planicart:Zeiss- Ober- 
kochen 
Autograph A7, A8, A10, B8, 
Aviomap: Wild 
PG FG3S Kern 
G6, G7. GS; Galileo 
IIC, III, IV:Santoni 
SFP, SDF:OMI 
Typical complementations/extensions 
made on these instruments: 
7 Digital output of the X, Y and 
Z coordinates for transmission to a 
coordinate recording instrument, a 
PC or an electronically controlled 
digital drawing table 
- Digital output of the photo 
coordinates x, VW, XX, y" for 
transmission to a coordinate 
recording instrument or a PC (e. g. 
for analytical aerotriangulation) 
- Digital input of the orientation 
data ¢, œ, x, bx, by, bz (received 
from 
aerotriangulation Or computer- 
assisted orientation) into a plotter 
- Conversion of analog into 
analytical plotters 
- Expansion of the optical 
system to allow simultaneous obser- 
vation of photo and map (superimpo- 
sition) 
- Increase of the viewing magni- 
fication, e. g. in the case of the PG 2 
from 2X - 4X - 8X (standard) to 
3X-6X-12X or 4X-8X- 16X. 
2.2 Analytical plotters 
The older instruments of this 
category, produced approximately 
between 1980 and 1985, include 
among others: 
Planicomp C 100:Zeiss Oberkochen 
Aviolyt AC 1, BC 1, BC 2: 
Wild 
DSR 1:Kern 
APC 3, 4, 5: OMI 
Digicart, Stereocart:Galileo 
Traster:Matra 
SD-4:QASCO 
Typical complementations/ moderni- 
zations: 
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