28 

 26 



24 

 22 

 20 

 18 

 16 

 14 

 12 



ANY PROFILE LINE 

 LEGEND 



— FIRST SURVEY 



SECOND SURVEY 



CORRECT DATA 



^DISTANCE ERROR 



IS NOT OBVIOUS IN 



THESE REGIONS. 



100 200 300 400 500 600 700 800 900 1000 



DISTANCE, M 



Figure 7. Samples of typical surveying errors and their effects 



15 



