耕地后备资源评价中地形坡度指标获取方法分析

Analysis on methods of obtaining topographic gradient indexes in evaluation of cultivated land reserve resources

"人多地少"是我国的基本国情,耕地的大量抛荒及不合理使用导致我国耕地资源严重不足。为了缓解国家粮食安全问题,耕地后备资源成为了耕地的重要补充来源,也是实现占补平衡的保障。地形坡度作为评价指标必不可少的评价因子,文章对其获取方法进行了分析研究。利用GIS技术为支撑,通过对不同类型数据处理分析实现地形坡度指标值的获取,并结合数据处理规则,研究数据快速可行的处理方法,为今后相关工作提供技术支持及参考依据。

Large population and less land" is our country's basic national conditions. A large number of arable land abandonment and irrational use have led to a serious shortage of arable land resources in China. In order to alleviate the problem of national food security, the reserve resources of cultivated land have become an important supplementary source of arable land, and it is also the guarantee for the balance of divination. Topographic slope is an indispensable evaluation factor for evaluation indicators. This article analyzes and studies its acquisition methods. The use of GIS technology as a support, through the analysis of different types of data processing to achieve the value of the terrain slope index, combined with data processing rules, research data processing methods, to provide technical support and reference for future related work.