Faced to the problems of environmental resources diagnosis and land resources utilization decision during the regional comprehensive control and development

a current expert knowledge model has been designed.This model combines data bank with graphic bank through data dictionary and expert rules

calculation results can be transferred to special graphic and result data bank

it improves the working efficiency greatly.This design permits user to correct every item

therefore

strengthen the system flexility and enlarge the applying scope

it can be used directly in soil erosion intensity division

land suitablity evaluation

latent land productivity evaluation

land economic evaluation

and land utility planning.