GIS支持下土地整理中未利用地适宜性评价——以广西柳城县为例

ASSESSMENT ON THE SUITABILITY OF UNUSED LAND RESOURCES BASED ON GEOGRAPHIC INFORMATION SYSTEM IN THE COURSE OF LAND EXPLOITATION AND ARRANGEMENT——TAKING LIUCHENG COUNTY IN GUANGXI PROVINCE AS AN EXAMPLE

土地适宜性评价是土地开发整理的基础 ,而未利用地作为土地开发整理的主要对象 ,本身就具有自然和经济上的特殊性 ,显然土地整理中未利用地适宜性评价更是土地开发整理中的关键性工作。结合GIS技术设计了土地整理中未利用地适宜性评价的总技术路线 ,进而对具体评价过程从以下四个方面进行阐述 :(1)未利用地评价单元的划分方法及在计算机中的生成技巧 ;(2 )评价因子的选取和评价指标体系的建立 ;(3)运用特尔斐法与数学模型相结合的方法确定各评价因子的权重 ;(4)评价结果生成过程。以广西柳城县为例运用本评价系统对其未利用地进行适宜性评价 ,能以较快的速度得到适宜性评价结果和各类适宜性用途的空间分布 ,并对全县未利用地的合理利用提出了可行性建议。

The assessment on suitability of land resources is the base for land exploitation and arrangement. Unused land that is the primary object of land exploitation and arrangement has special natural and economic characters. The assessment on suitability of unused land resources is the key work in land exploitation and arrangement. Firstly,the unused land assessment method based on Geographic Information System is designed in the paper.Further,expounding the course of assessment from four aspects:(1)the method of choosing assessment cells and creating technique in computer;(2)selecting assessment factors and assessment index system;(3)ensuring proportions of assessment factors by the means of Delphi and mathematics model ;(4)the course of land assessment. Lastly,the application for the landsystem is made through the unused land assessment of Liucheng County,the assessment result can be quickly displayed on the map,providing some feasible advice for land using.