Zusammenfassung
In diesem Berioht wurden die teohnisohen Daten die vom Charakter
der Kartenbearbeitung abhängig sind erörtert« Es wurden folgende
Probleme dargestellti
- das Prinzip der Konstruktion örthophotografiesoher Instrumente,
~ Anwendung der Instrumente bei der Kartenbearbeitung,
- Genauigkeitsforderungen der Ortophotokarten*
Ausserdem wurden folgende äkonomisohe Parameter der Orthophoto-
karten ero M rtert t
1 « Introduction
All methods of maps compilation and measurement execution
create technical, financial and economical problems* This is
extremely significant in orthophoto technique* The cost of
orthophotomap production is a factor whioh in reality makes
this method different from other technologies used at present*
The cost is directly connected with instrumentation and the
speed of operation* However, the expenses for photogrammetrio
field works are similar in all methods - when the same kind of
aerial photographs is considered* But the cost of the remaining
photogrammetric work is different and depends on the instru
mentation used, the length of time involved in performing
this wçrk, productivity of the staff and performance of
equipment*
2* Technical data conditioned by the quality of map compilatio n.
Economical aspect in orthophotography [1] is connected with
the instruments adaptation to the quality and range of map
production* Several factors will have influence in this case*
The first is conditioned by assumptions concerning
construction principles of orthophoto instrumentation*
It is well-known that the stereoscopic terrain model is the
base for the measurements when photographs are concerned*
This stereoscopic model can be reconstructed in an analogue
or analytical way* Both methods are now parallelly used*
Taking into consideration that the analytical solution will
be the best in the future we have to remember about commonly
used analogue plotters* Therefore, the builders of orthophoto
instruments are obliged to design the orthophoto countershafts
for these plotters* Analytical solutions are till now limited
by the comparatively high price of analytical plotters*
The way of photographic picture rectification into orthophoto
has a fundamental influence on the device construction*
Optical rectification is now in common use, however electronic
systems for transportation and transformation of the picture
are in successful development* The question of the width of
rectified strips in optical rectification or size of analyzed
elementary surfaces in electronic systems is here combined*
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