II. GENERAL ISSUES
Before describing the AMP system, an overview is given of some basic
issues, These concern the place of an AMP system in a broader photogram-
metric context, the classes of analytical mono-systems, their potential
applications, and the evolution of mono-systems.
1. AMP in the broader context
A broader photogrammetric context can be defined by a matrix repre-
sentation of the restitution methods versus the corresponding means
(table 1).
METHODS MEANS
Analogue Hybrid A | Analytical Hybrid B All-digital
Stereo Stereo- Computer Analytical |APs with Stereo-
plotters supported |Stereo- scanners systems
plotters
Mono Rectifiers | Computer Analytical Mono-
Orthoprint | Supported |mono-systems systems
ers ;
Table 1: Photogrammetric restitution systems
The category "hybrid A", in table 1, represents the computer supported
analogue equipment, whereas the category "hybrid B" represents mixed
analytical and all-digital systems. The all-digital systems, using digi-
tal images, are at present in an experimental stage of development.
Hence, further consideration is restricted here to the analytical mono
systems.
2. Classification of analytical mono systems
These systems can be classified according to the types of product and the
technique for geometric transformations (table 2). The products can be
line maps (in graphic or digital form), containing extracted information,
and photo—images. The latter can be annotated and thus represent a mixed
product.
The transformation techniques can be the areal rectification of horizon-
tal or inclined planes in terrain, and the incremental orthogonal
transformation of images of arbitrary terrain. The latter uses local
terrain relief data (DTM) as input.
PRODUCT TYPE GEOMETRIC TRANSFORMATION
Rectification (by planes) Ortho-transformation
Photographic Photo rectifiers Orthophoto printers
Graphic (line) Line rectifiers AMP systems
Table 2: Classes of analytical mono-systems
3 Applications of AMP
AMP is applicable to complete mapping and to differential mapping,
provided that corresponding digital terrain model (DTM) data are
available. These techniques can be further branched, as shown in table 3.
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