【作者】 门明新；

【导师】 许皞；

【作者基本信息】 河北农业大学 ， 土壤学， 2001， 硕士

【摘要】 农用土地分等定级是当前国土资源大调查重要组成部分，是土地管理部门一项重要的基础工作。其成果对地税征收、实现权能、规模经营、吸引投资、土地持续利用等均有重要的意义。然而农用土地分等定级工作程序复杂、信息量大，人工完成势必耗费大量的人力、物力、财力，且工作周期长。因此有必要进行农用土地分等信息系统的研制与开发，辅助用户多快好省地完成工作。本文在系统分析农用土地分等信息系统建立的原理与方法的基础上，建立了基于GIS的县域农用土地分等专题型信息系统，系统由农用土地空间数据库、属性数据库和模型库组成。三库之间建立有机联系，能够实现从数据获取、分析到结果输出、生成专题图件的全过程。空间数据库采用地理信息系统软件Arc/Info与Arcview建立，并可在Arcview环境下便捷地进行行政区和农用地等图形信息的查询。属性数据库采用Visual Foxpro6.0建立，用户可轻松实现对数据库中数据的输入、浏览、添加、删除等维护操作。空间数据库与属性数据库采取统一输入、分开管理的方式，在两库之间通过灵活的接口，使它们成为统一的整体。模型库是系统的精髓，本系统设置了光温生产潜力模型、作物产量比模型、土壤有效系数求算模型、单元土地生产潜力模型、土地标准粮总量模型、土地利用系数计算模型、土地经济系数求算模型、土地等指数计算模型。模型以Visual Basic6.0子程序形式进行存储，并通过模型库字典对模型进行维护工作。系统通过菜单与交互对话的形式完成了数据的输入、信息显示、模型分析、结果输出等功能以及对农用土地分等数据库与模型库的维护。通过对蠡县农用土地分等信息系统建立的实证研究，利用计算机自动完成分等信息的输入、数据分析、土地等指数计算、等别划分等工作。节约了工作时间，减少了工作量，大大提高了工作效率。并且系统界面友好、美观，使用简洁方便。更多还原

【Abstract】 Arable land gradation and classification is one of important parts of present land resources investigation of wide scope and fundamental tasks of the land management department. Its achievements are of great importance and will be used to levy land taxes, to realize land powers and functions, to attract investment and to promote land scope management and sustainable utilization. In this work, the process is very complex and the amount of information is very large. If it is dealt with by hand, it will cost a lot of manpower, material and financial resources and it is very time-consuming, so it is essential to develop arable land grading information system to assist user quickly sparingly accomplish this work. This paper systematically analysis the principles and methods of developing information system. The organic connection among the three databases realizes the process of retrieving and analyzing data, outputting results and creating the thematic graphs. The thematic information system of arable land is established on the basis of GIS. This system is composed of spatial database ~ attribute database and model base. Spatial database is established by the geographic information system software Arc/Info and Arcview and the arable land grading graphic infortuation is conveniently inquired in Arcview. Attribute database is established by Visual Foxpro6.O. The users may inputs browse~ add and delete data with ease. Spatial and attribute database use the model of unified input~ separated management and form an entirety through flexible interface. Model base is quintessence of this system. It comprised of light-temperature productive potential model .~ crop yield ratio model .~ soil effective coefficient model., land productive potential model~ theoretic standard crop total amount models land use coefficient model.. land economic coefficient model.. land grading index model. Models are stored as subprograms of Visual Basic6.O and managed through a model base dictionary. The functions of this system are realized through the menu and mutual-dialogue. Through a case study in Licounty, arable land grading information system can automatically complete information input., data analysis.. land grading index calculation and divide land gradation. This system saves working time and improves efficient. Friendly and beautiful face makes it briefly convenient to operate.更多还原