ind 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
in- 
eas 
ics 
ra- | 
ap- | Sub-divide the study area into 
of —>| regions with similar photomorphic 
ach characteristics 
es- 
and 
Land system Thematic maps and re- 
mapping connaissance survey 
Ogy 
nci- ; Sub-divide a land system into sub- 
= TM image ; p nur Lui 
; of d: 100. 000) regions with distinctive photomor- 
se, phic characteristics 
"er- 
and eo» Select sampling area in a sub- 
nd. — region 
1 
Aerial photographs Land unit map- Thematic maps and 
(1:50, 000) ping field observation 
Sub-divide a land unit into small 
——| areas with distinctive photomorphic 
characteristics 
S. Select sampling area in a small area 
Aerial photographs Land site map- Thematic maps and 
(1:10, 000) ping field check 
  
  
  
  
  
  
  
  
  
Figure 1 Flow Chart Showing Extracting Land Type Information from Imagery Using 
the Multi-level Sampling Interpretation Approach. 
181