opic, 
gital 
ig of 
ning 
rt of 
1 256 
ith a 
vide 
's on 
After 
tereo 
'esses 
some 
and 
1etric 
uct - 
ation 
e is 
gital 
one 
m to 
be observed in adjacent to 
photogrammetry fields of 
knowlege, in science and 
technology on the whole. The 
greatest contribution to realization 
of the main idea has been made by 
the producers of computing 
techniques. Photogrammetrists have 
had an opportunity to use external 
memory of 1-10 Gb hard disks for 
storing digital photographs and 
multiaperture photoelectric sensors 
on CCD-lines. 
The main feature of digital stations 
is usage of a digital image allowing 
to realize some additional 
possibilities when photogrammetric 
processing the photorgaphs, for 
example: 
* automatization of 
indefication of 
photographs; 
* possibility for superimposition of 
vector- and raster-images. 
¢ fast manipulation with images; 
stereo- 
points on 
2. DPS STRUCRURE 
DPS "Delta" includes: 
* Precise 
scanner. 
* File-server. 
+ CD-Recorder for 
storage of data. 
+ Network equipment. 
+ Working places for stereomaking 
and orthophototransforming. 
photogrammetric 
long-term 
239 
The parts of the system interact in 
the following way. A chossen file- 
server joins scanner, working 
places and additional peripheral 
equipment in a common system. It 
also assures optimal distribution of 
resources, storage and transmission 
of data. For the purpose of 
heightening the speed of data 
communication the server is 
bound up with working places 
through network equipment 
100Mb-ETHERNET. 
Computer modifications for scanner 
and working places have to be not 
less than PENTIUM 100/16 Mb 
with disk memory - 1 Gb. Not less 
than 17" monitors with the 
resolution of 1024*786 elements 
under 256 gradation of grey in 
graphic, mode are , used .. for 
stereomaking. Either  eye-glasses 
providing with control shutters or 
prismatic stereoscopic nozzles are 
used for stereoviewing. 
Proceeding from the range of 
settled tasks, the number of 
working places can be changed. 
However, it is optimal to use not 
less than 4 working places 
for stereomaking and 
orthophototransforming. Such 
configuration will allow to 
distribute the cost of scanner and 
output devices for collective use 
and to reduce their own specific 
cost. 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B2. Vienna 1996