Design And Implementation Of Land Carrying Capacity Evaluation System Based On ArcGIS Engine

The carrying capacity of land resources can provide basic elements for regional coordinated development and optimization of land use spatial structure.Land resources are the material basis and space for human survival,and are the most important foundation for social and economic development.The carrying capacity of regional land resources is Social and economic development plays a direct role.At present,there are still technical shortcomings in the assessment of land resources and environment,especially for the assessment of land-based assessment,and the decision-making platform for the collection,analysis and evaluation of basic data has not yet been established Based on the computer architecture theory and business processing logic,based on the comprehensive analysis of many research programs,the evaluation system is designed by means of ArcGIS Engine platform,and a computer programming model which can be used for the calculation of land resource carrying capacity is constructed Microsoft Visual Studio 2010 is the development platform,C#is the programming language,the ArcGIS Enging class library is called,the C/S architecture mode is designed,and the design and implementation of the land resource carrying capacity evaluation system is carried out.Based on the database platform SQL Sever and GeoDatabase,the attributes and spatial database are built and integrated into the evaluation system to realize the system integration service.Finally,Jinan City was taken as an example to test the evaluation system to verify the performance and accuracy of the system.The main work of this research is as follows:(1)Based on the PSR model,22 evaluation indicators are pre-set from three aspects:natural,economic and social.The entropy weight method is the method for determining the weight of the factor.The carrying capacity index is used to calculate the carrying capacity of the study area and rank it.Division.In-depth analysis of the evaluation process of land resource carrying capacity,analysis of the business connotation of the evaluation process,including the pre-set evaluation index system,the standardization of the original data processing method,the mathematical principle of the evaluation factor weight determination,the bearing capacity index calculation,the bearing capacity classification.Providing a theoretical basis for system design is the basic work of system design.(2)The evaluation system designed in this study mainly consists of four modules:map operation(data loading,saving,map browsing,map export,map measurement,feature selection,exit system),query and analysis(attribute query,space)Query,radiation range analysis,acquisition of feature boundaries,Excel conversion to spatial point data,adjacent feature query),comprehensive evaluation(evaluation factor selection based on PSR model,entropy weight method calculation index weight,comprehensive index method to calculate bearing capacity),map mapping(Unique value symbolization,unique value multi-field,hierarchical color,grading symbol,scale symbol,dot density,map features,output and print).Through the computerized business operation,the evaluation process is computerized,and the evaluation process is integrated in the system,which improves the work efficiency and the accuracy of the evaluation.(3)The system completes the cross-platform design of the database,the spatial database is built in GeoDatabase,and the attribute database is built in SQL Sever to realize efficient management and integrated services.(4)In order to test the accuracy and system reliability of the land resource carrying capacity evaluation system,this study takes Jinan City as an exmple to carry out systematic tests.The system evaluation results show that the land resource carrying capacity of Jinan City is between 0.2 and 0.7.The space is scattered,radiating from the center to the outside,the comprehensive index value of the bearing capacity becomes larger,and the urban development space increases.The evaluation results are consistent with the actual research,so the system is stable and reliable.Based on the method,based on GIS technology and computer technology,this paper designs a complete land resource carrying capacity evaluation system with sub-module operation and system integration,and builds all data and systems on the.NET platform,using C#language.Implement system construction.Effectively build attribute data in SQL Sever,spatial data is built in GeoDatabase,to achieve date separation and cross-platfonn integration.In practical application,the research on the carrying capacity of land resources at home and abroad mainly focuses on comprehensive bearing capacity assessment,process analysis and trend prediction.The evaluation system is only integrated into other software in a single module,This research develops an independent computer evaluation system,which not only enriches the functions of computer software,but also promotes the system and applies it to population,economic and resource problems with similar properties.The area serves as a model.