ANALOGICAL EQUIPMENT - ASSISTED DIGITAL DATA EDITING 
Dr. eng. Gh. CORCODEL, 
Finsiel Romania 
B-dul Ficusului nr.42, et II 
sector 1, Bucuresti 
ABSTRACT 
For a long time, the Institute for Geodesy, Photogrammetry, Cartography and Land Management has been 
concerned in using its photogrammetric analitical equipment as efficiently as possible. Having this aim in view. 
stereometrograph has been assisted by pheripheal devices to edit digital data. A general digital data 
presentation is firstly made to point out its efficiency in any GIS development. This paper describes harwares 
assisting the stereometrograph. All the equipment has been manufactured in our country except the process 
computer. At the same time, a software using this data in a GIS development for the general cadastre also 
given. Finally, an example as graphs and tables covering a certain area is shown, as well. 
KEY WORDS: Digital Data, Data Processing. GIS. 
LINTRODUCTION 
The main objective of this articol is the 
constitution of a digital data-base as a support of 
specified functions of cadaster which has at its base 
the analogical stercorestitution. This is used to 
obtain a topographical map with a double function: 
on the one hand a function of storing up and on the 
other hand a function of displaying. The both 
functions are simltaneously involved on the 
topographical map and this aspect causes great 
difficulties in practical using of the topographical 
plan. 
For this reason we have to pass to a new 
conception of creating a new topografical map. 
The digital topografical map is considered to be a 
data base because it contains all the necessary 
informations for this plan. Indifferent of the 
structural form of data the digital map is formed by 
a lot of card indexes. containg graphical 
informations ( those which refer to the form and 
size of entities which will be represented ) and also 
text informations (which refer to the qualitative 
characteristics of these entities). 
The constitution of the digital data base, from the 
data which results that stereometrograph, on an 
analogical way, involve the endowment of this with 
hardware equipments, which allow the storage of 
these data. Our system was conceived and achieved 
by ADIPA s.r.l. Bucuresti company, on the basis of 
technological requirements imposed by author. 
  
! For this purpose we cooperate with ing. Visescu I. 
and ing. Vasilescu V. from I.G.F.C.O.T. Bucuresti 
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This system can be interconected. not only with the 
stereometrograph, but also with any sort of 
analogical measurements system, which contains 
electro-mechanical systems with selsyne. 
2. THE HARDWARE DESCRIPTION OF 
SPECIALISED INTERFACE 
Generally are used instruments with optico- 
mechanical projection, Zeiss-Jena like: 
e  stecometer (4 coordinates). with precision : 
~ 0.001 mm; 
e  dicometer (4 coordinates), with precision : — 
0.001 mm: 
e  stereometrograph (3 
precision : — 0.01 mm: 
e  topocart (3 coordinates), with precision : — 
0.05 mm. 
what have in its composition optical-mechanical 
systems of precision and electrical-mechanical 
systems with selsyne (fig. 1). 
coordinates), with 
The specialised interface is composed, concerning 
hardware, by two execution modules. The first 
module is refering to the digitizer-box, which is an 
integrate device or is out of photogrammetric 
system which has the role of analog-digital 
converter for electric dimensions with proportional 
values with the translation of mobil part of 
instrumens. This has 4 groups of A/D conversion 
equiped with selsyn receiver. mechanical systems 
of gearwheels with a resolution from 500 to 2000 
impuls of rotation. The second module is a bearing 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B2. Vienna 1996