基于GIS的农用地分等研究——以无为县为例.pdf

基于GIS的农用地分等研究——以无为县为例摘要随着无为县经济的发展、人口的增长和城镇规模的快速扩张,无为县的土地需求量急剧上升,耕地数量在不断减少,人地矛盾日益突出。全面、科学地开展农用地等级质量属性的综合评价,科学量化农用地数量、质量和分布,是我国新一轮国土资源大调查与综合评价的一项重要基础性内容,它可为实施全县区域耕地占补平衡制度、理顺土地价格体系、培育完善土地市场,促进土地资产合理配置,开展土地整理、土地征用补偿、农村集体土地使用权流转等工作提供依据。此外,鉴于地理信息系统(GIS)可辅助处理大量的图件及属性资料等强大的空间数据分析功能,可减少工作强度、提高工作效率,将其运用至农用地分等工作成为必然。本文以国土资源部颁布的《农用地分等定级规程》和《安徽省农用地分等实施方案》为技术依据,在对无为县农用地的实际情况进行深入了解和搜集分析大量相关资料的基础上,利用软件Excel、Access,统计软件SPSS,GIS软件ARC/INFO和Arcview对其进行农用地分等研究。在分等的过程中,本文着重对分等单元的划分方法、空间数据库和属性数据库的建立以及分等因素因子的选取方法进行了探讨。通过利用GIS技术和定量分析方法,为农用地分等提供了新的空间。在对无为县农用地分等结果的分析中,作者对当前农用地分等工作产生了一些思考,并提出了需要改进的一些建议。其中在理论上需要完善的有:、级内涵的界定;、综合等的科学性需要进一步的论证;。在操作技术上仍需提高的有:;、土地经济系数等值区对行政村界的突破;。通过以上工作,以期对未来无为县农用地利用、开发和整理,起到一定的参考价值。关键词:农用地分等;GIS;无为县GIS-assisted farmland classification research ——A case study from Wuwei County Abstract With the development of economy, the growth of population and the quick expansion of cities, the land demand is increasing rapidly, the amount of the farmland is decreasing constantly, and the contradiction between people and land es more and more serious in Wuwei County. It is one of important basic contents of a new round survey prehensive evaluation on land resources in our country to develop prehensive evaluation on farmland quality level overall and scientifically and quantify the quantity, quality and distribution of farmland scientifically. It provides the evidence for implementing cultivated land occupy-fill balance system in the whole county, clearing up the land value system, perfecting the land market, promoting the reasonable allocation of land resources, carrying on land arrangement, land pensation and rural collective land use right circulation, etc. Furthermore, GIS has the powerful spatial data analysis function to assistant to process lots of maps and attribute data which can reduce the work intensity and improve the work efficiency. So it is necessary to apply GIS to farmland classification. According to “The Re