Oliveira, Ronaldo Pereira de 
EE a 
  
    
1 : 75,000 
    
Critical 
Areas 
  
    
Morphography 
   
  
  
  
  
  
1 : 50,000 
Limiting 
Factors 
Areas 
to be 
Revised 
  
Figure 4. Conceptual model of terrain object classes integrating geoinformation to land environmental planning, 
including purposed spatial analysis (DTM and Image Processing) to be evaluated. 
conflicting classification. Still, in extremely high (EA) vulnerability class for highland areas there was a very small 
difference around 0.1ha, showing that for those steeped slopes the DTM generation should be further refined. In low 
lands environment this procedure did not bring any significant difference, matching precisely previous calculated areas 
unless for areas with very high (MA) vulnerability class with a small difference of 0.4ha. 
Further analysis has considered digital image processing functions for supervised classification, providing means to 
evaluate possible refinements for vulnerability assessment at low lands. Output results from final overlay phase were 
  
  
International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B7. Amsterdam 2000. 1079