Stratification 
   
   
   
GIS data 
    
      
  
  
population 
census 
     
   
census 
attributes 
     
surfaces 
   
    
features 
    
   
   
  
  
    
training les 
  
KE 
probability 
density 
maps 
AB 
Thi 
pro 
Ce: 
ima 
anc 
likelihood 
maps 
*s Z 
Ec om 
= 
> 
_ 
> 
Nev 
DC. 
of « 
sun 
airc 
(Gr 
resi 
enc 
pho 
utili 
Figure 1. Insertion of prior probabilities in the maximum likelihood classifier and 
sec 
Sun 
0.0 Hitc 
Was 
heic 
The 
PC 
erro 
exis 
des; 
eith 
MM MM.MM 
  
-1.0 + 
The 
cont 
cont 
aci 
mag 
mici 
whic 
sma 
are 
-3.0 4 
In p(R) 
  
  
Detached Ms 
Noll 4^ Semi-Detached 
  
The 
mmm Apartments po 
-6.0 + + } } phot 
1.0 2.0 3.0 4.0 5.0 6.0 appl 
In R map 
Out | 
= = = Terraced 
  
  
  
  
  
  
Figure 3. Density profiles of the four residential dwelling types of Norwich, England 
562 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996