=:1396 + 
  
  
   
    
  
  
   
    
  
  
  
  
  
   
   
   
    
  
   
    
    
  
  
  
  
  
  
     
  
   
  
— Geomorphology. Main morphological aspects are visible in radar imagery 
due to changes of reflection at locations where there are changes or 
reversal of slope angles. 
— Geodynamic phenomena. Geodynamic phenomena which might be recognized in 
radar imagery are large scale regional faulting patterns, which are 
reflected in the geomorphology. 
6.3 Use of radar imagery during the various stages of an engineering 
project 
In the preliminary investigation phase of a project radar imagery, if 
available, can be used to investigate regional fault patterns together 
with detailed seismic epicenterdata to estimate earth quake damage risks. 
In any of the other stages of a project radar imagery does not provide 
information of suitable scale and detail. 
T.Thermozszranh s 
Information on the temperature of the earth's surface càn be obtained by 
recording of the radiation in the middle (3-5 y) and far (8-13 um) 
infrared with optical mechanical scanners (as in MSS) or by recording in 
the microwave range (8 mm to 20 cm) with a passive microwave radiometer 
using a scanning antenna. 
The thermal information obtained during the scanning can be processed in 
such a way that a "thermal image" is produced. Such thermal images show 
different greytones or colours which are based on the temperature 
differences of the objects. Images are poor in resolution if flying 
height is too high and the imagesare very poor in geometry if flown too 
low over non-flat terrain. The most important drawback, however, is the 
dominance of a variety of factors such as air-temperature, terrain 
sloping direction and dipangle, wind velocity, airmoisture, vegetation, 
and soil moisture on the absolute temperature information as well as on 
the contrast between different materials. 
These factors all together make thermography a RS technique, which will 
not be applicable in the investigation stages for an engineering project, 
unless an aspect to be investigated is strongly correlated with appre- 
ciable temperature differences of the ground, which are not obscured or 
disturbed by the above mentioned factors. 
some application possibilities are the occurrence of fresh water springs 
in the sea, sources of geothermal energy, and the recording of heat loss