between the factors. 
  
An 
| 
M M bé 
| 
  
| » YIncreme |« 
| 
| 
picea 
E i 
; Decrease 
  
  
P/ National Food 4 
Production 
Fig.1 Basic concept of Asian Model from 
  
the social systems engineering 
In Fig.1, GDP is obtained from a calculation 
involving capital and labor using the Cobb- 
Douglas function. These data for income is 
then used to calculate the demand for food. 
These relationships are as follows. f^ means 
the function. 
(Capital Stock) 
=f (Investment. Depreciation) 
(GDP)=f (Stock. Labor) 
(Labor)=f (Population. Labor ratio) 
(Population)=f (Birth rate. Death rate) 
(Birth rate)=f (GDP) 
(Death rate)=f (GDP) 
(Food Consumption ) =f(Population. GDP) 
Food supply is calculated from farm land and 
productivity. These relationships are as 
follows. 
(Food supply)=f(Farmland, Productivity) 
(Farmland) 
=f(Industrialization, Development) 
(Productivity) 
=f(Fertilizer, Precipitation, Temperature) 
In each country, if food demand exceeds food 
supply. it is needed to import food from 
The abl of 
importing food depends on income. 
abroad and vice versa. 
3.MODELING THE LAND USE CHANGE 
IN ASIA 
3.1 Data 
The data used in this study is as follows. 
1) International Financial Statistics Yearbook 
published from IMF. 
2) World statistics published from World 
Bank. 
3.2 Basic concept of land use change model 
Fig.2 shows the basic concept of land use 
change model. The ratio of urban population 
calculated from income is applied for 
estimating the future land use change in Asia. 
(The ratio of urban population)=f (income) 
(Arable land, cropland change) 
=f (The ratio of urban population) 
(Improved land) 
=f (The ratio of urban population) 
(Forest)=f (The ratio of urban population) 
(Other)=f (The ratio of urban population) 
Intemational Archives of Photogrammetry and Remote Sensing. Vol. XXXII, Part 7, Budapest, 1998 
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