Based on principle of grading

classifying and pricing agricultural land and composite type geography information system (COMGIS) and computer technology

the prototype of general information system of grading

classifying and pricing cropland (ALEIS) is developed. ALEIS is suitable for Chinese conditions for evaluating cropland. This system has 9 big modules including file

view

picture layer

object

layout and database

grading

classifying

pricing

windows and help etc. It has powerful functions in managing attributive data sets and spatial data sets

grading

classify and pricing cropland and outputting achievements etc. The interface of ALEIS is friendly

and the operation of the system is simple and convenient. It can realize automation in grading

classifying and pricing agricultural land

and offer the friendly and convenient computer business management tool for land and government administrative department of different levels.