The concept below will concentrate on mono superposition. 
Future development should take stereo superposition into 
consideration. 
Concept for an integrated system 
  
Fig. l shows a flow diagram for an integrated system. The 
system should not only take care of data from PHOTOGRAMS, but 
also data from SURVEYING instruments and EXISTING MAPS. The 
photograms could as well be substituted by SATELLITE IMAGES 
or combined with such. 
A) The PHOTOGRAMS should be IMAGE SCAN DIGITIZED creating 
an IMAGE RASTER FILE as well as STEREO 3-D DIGITIZING 
creating X, Y, Z DIGITAL TERRAIN MODELS and structured 
VECTOR FILES. 
B) The SURVEYING data should create structured VECTOR FILE 
to couple the activities in A) or act stand alone. 
C) EXISTING MAPS should be SCANNED or MANUAL 2-D DIGITIZED 
to create VECTOR FILES and DIGITAL TERRAIN MODELS. 
PATTERN RECOGNITION to be applied in the VECTORIZATION 
process. 
D) REPORTS and associated data should be limited to the 
VECTOR FILES in a two-way communication. 
E) TRANSFORMATION of the IMAGE RASTER FILE into an "orthogonal" 
projection should be done based on a DIGITAL TERRAIN MODEL. 
F) INTEGRATION of IMAGE RASTER and VECTOR FILES to be 
displayed on top of each other in the same projection 
system. 
507