the same object area (ie multistation methods) may Still be relevant if point 
transfer between all appropriate photographs is possible. 
The Bundle Method 
  
In several close range applications of photogrammetry, especially the measure- 
ment of industrial and engineering structures, the essential requirements are 
for a flexible system to acquire point information of high accuracy. These 
attributes suggest the adoption of an analyticl approach and one of the most 
flexible methods is based on the bundle adjustment, which has been used by 
several workers in the field (for example Kenefick (1971, 1977), Mayoud (1978) 
and Hädem (1981)). The bundle method is considered the most appropriate 
because each {individual image point is related to the object point and 
perspective centre via the central perspective projection. The relationship 
is fundamental to all photogrammetry and forms a sound basis for the multi- 
station approach, especially as information relating to the image points, 
object points and position or orientation of the camera can be readily 
accommodated. 
Multistation Configurations 
  
The concept of multistation geometry in close range photogrammetry is indicated 
in Fig 1 which shows a solid cube requiring co-ordination. Rather than 
taking conventional stereopairs, the eight convergent photographs shown (each 
camera axis being directed towards one corner and the centre of the cube) will 
image the object with considerable redundancy (see also Fig 2). 
  
x 
Fig 1: The co-ordination of a solid cube 
using eight multistation photographs. 
1,2,3 and 4 indicate typical target positions. 
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