= 1758 — 
Thailand /Miller, Nualchawee and Tom 
  
    
   
     
   
  
  
  
  
[ HISTORICAL MODEL 
OBSERVATIONS PROJECTIONS 
12000 | 
| [HILL EVERGREEN FOREST 
| __ 10000 Al SHIFTING CULTIVATION 
| $ x 
A I- 
| ® wol 
| £ DRY DIPTEROCARP FOREST 
| = L 
ul 
3 000} 
o 
Q E 
z 
$ 4l 
o MIXED DECIDUOUS FOREST WITH TEAK 
8 [ 
ul 
& xl DRY DIPTEROCARP FOREST WITH PINE 
[I x —À > ? e 
DRY EVERGREEN FOREST-— —49 ee pe pen 
1 1 n d À A 1 À À À 1 1 da 
1952 1956 1980 1984 m 1972 1976 1990 1994 1988 
TIME (years) 
FIGURE 7.3. OBSERVED FOREST COVER DEPLETION AND PREDICTION OF 
FUTURE TRENDS. The first four data points of each curve (1954, 1966, 1968 and 
1972) represent tabulations of the area of the cover types from the 29,290 cells of air 
photo interpreted data planes illustrated in Fig. 7.2. The model projections were simu- 
lated using a Markov process and the probability transition matrix computed from the 
comparison of the 29,290 cells of the 1968 and 1972 cover type maps. 
  
  
  
  
  
(a) MSS band 5 (b) MSS band 7 
FIGURE 74. LANDSAT IMAGERY OF THE NORTHERN THAILAND FOREST SITE. These graymaps 
extracted from the LANDSAT imagery were geometrically rectified, resampled to 1 square hectare reso- 
lution, masked to include only the area inside the study site and overlaid upon the other landscape data 
planes. Note the lack of correlation between these graymaps and the 1972 land cover map of Fig. 7.2d 
due to terrain induced radiance variations.