ld
are made with the CONT program of the TOPAS program
paekage and the DZT 90 x 120.
= Provision of an additional digital output for the direct
connection of a digital drawing table (e.g. DZT 90x120)
or of an electronic recording instrument (e.g. COORDIMETER
H). ve.
The functional characteristics of the preceding instruments
of ORTHOPHOT E were retained. These characteristics also
largely apply to TOPOMAT Be
Because of the consideration of the terrain cross slope in
on-line differential rectification orthophotos are produced
in less time with a better visual impression of the ortho-
photos.
The mismatches remaining at the slit edges with use of the
cross slope corrector are reduced by the factor of 3 com-
pared with the operating mode without cross slope correction.
Since further accessories can be connected the equipment
system is flexible and expandable. For stereoorthophoto
production the tilt calculator's transformation gear is con-
nected between ORTHOPHOT and TOPCCART.
Simultaneously with the manual or automatic z guidance the
X model coordinate is shifted by the tilt caloulator in
dependence on the b /z base ratio. This shift corresponds
to artificial horizóntal parallaxes in ihe stereomate,
By connecting a digital control unit with an input-output
periphery to the equipment system this becomes also appli-
cable for off-line differential rectification, The conirol
data for the automatic control of the rectification process
are ascertained by. the programs BEST (from profile data
gained with on-line rectification) and DETO (from digital
terrain models).
3e IOPAS - program system for the automatic differential
rectirication WITh TOPCCANT/ORTEOPEOT
3,1, Structure and ayplicabilities
The program package TOPAS (TOPOCART-ORTHOPHOT program system
for analytical control data calculation) serves for the
calculation of control data for an off-line differential
rectification process and for the automatic contour line
drawing from digitally stored height data of the terrain
to be mapped. It is written in FORTRAN IV and designed for
minicomputer with a usable main storage capacity of 64 Xbyte,.
TOPAS consists of the DETO, CONT, BIDI programs and the data
bank modules (SERV, READ, OUTP, TRAN, EDIT required for
the generation and updating of the data bank,
Basis for the calculation of off-line control data are files
of the TOPAS data bank, which contain the digital height
model of the working area (Fig. 2).
The primary data required for the generation of the TCPAS
data bank can be derived from the following sources:
- Stereoplotting from photographs with digital recording
(profiles, contour-lines, single points arranged in an
array or irregularly).
[Z7]