Estate & 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Distriet Maps Estate Data 
Y Y 
Y Y 
MAP BASES: DATA 
* Sample BASES: 
points * Attribute 
* Land units data of 
* Land class thematic maps 
* Estate base * Associate 
value data 
  
  
  
  
  
  
  
Fig. 4 Flow chart for 
Dongsheng project with CLAS 
It was concluded that GIS was successfully used in the land 
assessment and has a great potentiality in the forthcoming 
estate archive management and updating. The 
achievements derived from the practices at the preliminary 
stage could be summarized as the following; the design of a 
GIS fitted for the computer platform in China; the 
incorporation of raster and vector data structure; the 
routines for map projection transformation; the preliminary 
legend data base for mapping; the easy-handling Chinese 
interface for user; the digitizing routine for the entry of 
thematic maps. 
7. ACKNOWLEGEMENTS 
The author would like to acknowlege the assistance of 
Zhaoxin Meng and Hongju Zhan from Chengdu Subcentre of 
Agricultural Remote Sensing during the programming stage, 
the contribution made by associate professor Hechao Li from 
Sichuan Institute of Land Surveying and Planning to organize 
the application of CLAS in Dongsheng project, and the 
assistances given by professor Deming Zhou from Sichuan 
Normal University in Chengdu project. Special thanks are 
also extended to staff from Chengdu Bureau of Land 
Management and Shuangliu Bureau of Land Management for 
their graciously providing all historical and sampling data. 
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