Research On County-level Rural Land-use Database Construction And Quality Control

Land is the important material base for human’s survival and development, which islimited non-renewable resources and precious wealth. There is a relationship betweenpopulation, resources, environment and land. With the rapid development of society andeconomy, urban population is increasing, the land for construction demand is increasing,the conflicts between economic development and the supply for land will be more andmore serious; In July,2007, the second national land survey comprehensively carry out,inorder to know the status and ownership condition of land in our country, grasps the exactland based data, establish and perfect the land system, realize the socialization of landresource information service.It is comprehensive, accurate, timely to understand the current use of land resources,Combined with “3s” technology to launch the investigation of the rural land use status,land change survey and the construction of rural land use database, it is foundation to sharethe information of land resources and land scientific management.Based on the secondsurvey of rural land, land change and remote the actual working experience of sensingmonitoring in Linchuan, also read academic research theory of domestic and foreign,Combined the theory with practical method, describe the rural land using in county, thedatabase construction and quality control detail. Here are my achievements:1, Introduction about the second rural land survey of technology process, obtainingremote sensing data, DOM production, interpreting RS, outside survey, data processing,construction of the land use database and database alteration to carry on the practice,analysis these problems and the solution in the process.2, Discuss some key technologies of the land survey data processing,for example,data format conversion, coordinate system conversion, introduced spatial analysis methodand based on MapGIS platform district superposition analysis, extraction variation.3, Introduction of the error sources in the land survey, specific analysis data quality problem, in the process.The quality of the source control methods, interpreting RS, digital,and the data processing is the Key issues,Also,I put forward my opinion in thecorresponding optimized control technique.4, Reference the database of software defect levels in the second rural land survey,combining factors paired comparison with Delphi method (the expert analysis method)todetermine the weights of evaluation elements, and puts forward the apllicant land precisionelements weighted average defects, and evaluate quality of the results of database pointsmethod.As a result, the quality control is more ideal.