261 
Photogrammetric 
analogue 
==£> differential 
=£> 
analytical 
==£> digital 
method 
Devices 
analogue plot 
differential 
analytical plot- 
digital work 
ting device 
rectifier 
ting device 
station 
Discretized 
1-space 
2-space 
2-space 
co-ordinates 
1-grey value 
Mathematical 
traditional analysis 
methods 
1 
i 
1 
1 
functional analysis 
i 
< I r 
Figure 1: Methodical development of photogrammetry