International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B3. Istanbul 2004 Int 
ntern« 
Evaluation processes are carried out in a 0,25 cm interval bya By using data acquired from photogrammetric evaluations and 
software (PICTRAN) which is developed for photogrammetric by using graphics software (SURFER) contour line curves of 
purposes, These processes are carried out with arranging the rough surfaces and three-dimensional models of these surfaces 
pictures (photos) by inside and outside orientation of photos and are obtained (Figure 3). For clear vision of the surface 
by determining corresponding points in the result of roughness, topographic drawing is shown isometrically. 
comparisons. Acquired photo pairs are analysed as seen in 
Figure 1. 
Taking 
  
      
ee = x / - i 
a) omn | SE i 
: C) HE UR Measu 
Figure 2. 3-D joint surface roughness model handled by using digital photogrammetry ; a) photography of joint surface, b) surface a 
| roughness contour, c) topography of surface roughness [ After Unver and Unal, 1998]. 
  
4. COMPARISON OF VARIOUS ROUGHNESS made by using surface roughness coefficient (SRC) equation 
MEASUREMENT TECHNIQUES given as follows [Unal, 2000], 
In this study, a sample of andesite having 5 x 5 cm measures A 
was used. For the aim of the study discontinuity surface is taken SRE = —m 
   
as if it is a some part of a land. Roughness measurements were 
made as to obtain 3-D map. Roughness measurements obtained 
by these techniques are illustrated in 3-D isometric maps in Am measured surface roughness area 
Figure 3. 
n 8 
Profilo 
A, = nominal surface flat area ). 
As it can be seen from figure 3, measurement 
differences on the surface appears to be flue. Behaviour of On the specimen surface, SRC values of roughness topography 
contour line differences in a small interval decreased the obtained by using different techniques are given in Table 2. 
visibility of differences on the picture. For this, comparisons are 
Table 2. SRC values of specimen measured by using different techniques [Unal, 2000] 
  
  
  
  
  
  
  
Dial gauge drag measurement Digital |  Profilometiy 
measurement system system photogrammetry has 
SRC 1.0768 1.061956 1.057128 1.037668 rasn 
  
  
  
Figure