基于DEM的坡度数据生产关键技术应用与实践

Application and Practice of Key Technologies in Slope Data Production Based on DEM

坡度属性是反映地表单元平缓程度的一个重要指标,坡度调查是第三次全国国土调查的一项重要任务。针对基于DEM数据开展坡度数据生产现状及存在的主要问题,笔者首先推导了坡度计算的公式、数学模型,其次对坡度数据生产的技术路线进行了详细描述,为提高坡度数据生产效率,提出了解决方案,对采用的一些关键技术进行归纳、总结并进行剖析;最后结合具体案例特点对项目实施效果进行了简要介绍,对同类项目的生产有一定的示范性。

Slope attribute is an important attribute reflecting the smoothness index of surface units.Slope survey is an important task of the third national land survey.In view of the current situation and main problems of slope data production based on DEM data,the author first describes the technical route of slope data production in detail from the derivation of public formula and mathematical model of slope calculation,in order to improve the production efficiency of slope data,some solutions are proposed,and some key technologies are summarized,generalized and analyzed.Finally,combined with the characteristics of specific cases,the implementation effect of the project is briefly introduced,which has a certain demonstration for the production of similar projects.