- software for the developed tech-
nology included as a part into loading
modules: PROJ.EXE; NEWANA.EXE;
DGN.COM;
- a program package
adjustment - "Photocom" or
block".
for block
"Photo"-
The above set of technical means
actually forms a technological working
station of the on-line triangulation that
makes it possible to accomplish at one
working place and by one operator-
photogrammetrist all the ^ procedures
needed for block adjustment including
the formation of a catalogue of bridging
point coordinates and parameters of
orientation for each stereopair.
Integrated solution of the problem
providing for control of measurement
results for each stereopair, for
elimination of defective points, and than
their repeated mesurements permits to
increase reliability and precision of block
adjustment, to reduce the number of
forced additional measurements made by
the results of adjustment. An automated
way of mark bringing to the chosen points
and a graphical interface convinient for
use, all this reduces workload on an
operator and increase his productivity.
The developed technology was tested by
using aerial photography materials for the
test area and other objects surveyed.
The aerial photographs were processed
in the framework of research and
development program of TsNIIGAIK.
2. GENERAL ASPECTS OF DIGITAL
POINT TRANSFER
2.1. Preparation works
Preparation works have few differences
from works of traditional technology.But
nevertheless a special attention is paid to
an image quality of fiducial marks which
438
helps to define their coordinates with
accuracy 2-3 mkm.
Projects’ designing consists of carring out
of two parts of work:
- to choose and mark zones for forward
and lateral overlaps;
- to measure coordinates of centres of
selected zones on paper photos and
compiling data file for driver
STEREOANAGRAPH analytical plotter
(AP).
Project designing begins with laying down
photos on their strips and getting covering
assembly . After that go on with choosing
of tie and additional (check, control and
transformation ) points, that need to
compute geodetic coordinates. Measuring
coordinates of zones selected on aerial
photos by a digitizer is a new procedure
which allows to automatize following
procedures of plotting by STEREO-
ANAGRAPH analytical plotter. When
choosing a zone it is not necessery to write
the number of photo because coordinate
measurings of a point automaticly have its
unic number inside. Exception to the rule is
a necessety of giving the number to check
and control points for their identification
with a list of coordinates.
Having chosen zones on the first strip they
choose points on the second one, here
points transferred from upper strip are
appreciated. This procedure stops with
marking of every second photographs for
a block (marking zone points that
participate in adjustment) and laying doun
of all diapositives and contact paper
photographs. Mesuring of zone
coordinates is carried out by the digitizer
SMP-6410 connected with IBM PC.
According to software package of project
designing a screen of computer essential
commands of consecutive activities on
measuring of zone coordinates is
indicated. This Software provides:
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B2. Vienna 1996
NI
— CS TY
— o.
O (D2310 0 25 ro