Design And Implementation Of Land Multifunction Comprehensive Evaluation System

With the development of the concepet of sustainable land,versatility of land resources is gradually applied to evaluate the sustainability of land use and other research areas.The research of land evaluation is changed from region evaluation to state evaluation,from qualitative evaluation to quantitative evaluation,from the individual eveluation to the comprehensive evaluation.It developes more integrated,quantitative and intelligent.In China,the research of multifuctional land is not mature enough.It lacks of the systematic theoretical research and the establishment of the evaluation index system.In a comprehensive evaluation system,data acquisition and integration is difficult because of the wide range of index data and large amounts of data.Meanwhile,the traditional evaluation steps are tedious,error-prone and inefficient.With the development of GIS and computer technology,it provides new methods and techniques for the comprehensive evaluation of mulitifucitonal land.Currently,in the process of national land plan,the establishment of a comprehensive evaluation system is significant for mulitifunctional land evaluation and it provides technical platform for supporting policy formulation.This paper establishes the evaluation index system includes society,economy,resources,environment in accordance with the basic principles of multifunctional land.We build a comprehensive evaluation framework and process of multifunctional land.In order to facilitate data sharing,this paper builds a dababase based on Geodatabase and ArcSDE.We use oracle database to support land resource data processing,retrieval and display.The comprehensive evaluation system of multifunctional land is designed based on workflow from data processing,evaluation methods,statistical analysis,cartography,systems management and other processes to form an organic whole.The system is divided into five functional modules as sustainability evaluation module,database management module,map operation module,statistical analysis module,system management and maintenance module.Finally,we use the system to achieve a comprehensive evaluation of multifunctional land,namely the use of entropy method,AHP combined with Delphi method to evaluate and analyze the results of the evaluation.This study presents a comprehensive evaluation model of multifuncitonal land.It has certain theoretical significance.The establishment of the database for the multifcuncitonal land evaluation can also support the data foundation for other landuse evaluations.This evaluation system has changed the traditional evaluation problems such as tedious steps and inefficient status.It can be used for other landuse evaluations.It provides a supporting platform of the multifunctional land evaluation and also has a great practical value for other land evaluations.