On the basis of analyzing study area, the basin information is extracted from the data elevation model, based on the information. A distributed water resources simulation model is developed. The calibration and validation of the parameters are also studied by the SCE-UA algorithm. 在对研究区分析的基础上,利用DEM数据提取流域信息,构建了基于DEM的分布式水资源模拟模型,模型参数通过SCE-UA优化算法进行优选。
To manage lost of digital orthomap ( DOM ) data and digital elevation model ( DEM ) data, this paper presents an idea of building a system based on database technologies. 为了统一管理数字正射影像(DOM)和数字高程模型(DEM)数据,提出建立一个实用系统,该系统基于数据库技术统一管理海量的DOM和DEM数据。
This paper gives a new 3D spatial object model, iont which the 3D vector spatial data, digital elevation model and digital ground image data are integrated, and introduces COM to the implementation of the spatial object model. 提出了一种新的基于3D矢量图形、数字高程模型与数字正射影像相结合的空间对象模型的设计思想,并将COM组件技术引入到该模型的实现中。
This article studies following three aspects with emphasis : 1. Data acquisition of digital elevation model. 本文重点研究以下三个方面:1.数字高程模型的数据获取。
The traditional analysis of temporal-spatial field involves only the scalar field data such as digital elevation model ( DEM ), remote sensing image and so on, but pays less attention to the vector field data. 传统时空场分析多涉及DEM、遥感影像等标量场数据,对矢量场数据关注较少。