Fryer, John 
  
Figure 1. It is essential to photographically record the procedure as these have a very positive impact on the jury and 
give credence to the photogrammetrist's testimony. 
SS 
   
  
  
Figures 3 and 4. String line replicates ray of light from camera to teller's grille, note staff located on patterned carpet. 
Close-up of string-line onto teller's grille. 
  
  
  
  
  
  
  
  
  
  
String Li e n 
From 
Camer a 
E d 
LIU 
ques 1 i 
Obje* «cw t L| 
= JE SN 
hu B 
AN > 
Hold sta f of : 1, ~ I naa Ss : 
ootprintband Toon. DPA Ma £5 
re d Æfhei htg vett Wa x 3 : i 
T at hast ~~ usu raed comes samen E 
= en pt = 
v^l by * : 
i A 
= ld 8 x % 
  
  
  
Figure 5. String-line Technique to discover height of robber. 
Surveillance cameras are usually placed high on the walls of banks, presumably out of the way of casual interference by 
the public. If they were placed lower, say around 2 m above the ground level, then height determination calculations by 
this technique would be more accurate. The grazing ray across the head of a robber would then be close to horizontal, 
thereby making the exact location of the robber's feet much less crucial. 
The photogrammetrist must brief his attorney that the height values he produces can only be thought of as a ‘lower 
limit" for the height of the robber. If the robber is not standing fully erect, or has his legs apart when walking, then of 
course the determined height will be too small. The court (either the judge or prosecutor) usually asks for an estimate 
of how much should be added to the height determination in order to estimate the *true height" of the robber. Guess- 
  
International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B5. Amsterdam 2000. 249