摘要
建设数字流域首先要确定流域空间数据框架的结构及其构建方法,以确保数字流域包含充分且易于加工的空间信息,4D技术是以产品显示其优势的,以4D产品作为基础框架建设数字流域在黄土高原小流域已被推广应用。阐述了4D产品在数字流域中的作用,应用适宜于小流域的4D技术体系创建数字流域的技术流程及其精度和效率的影响因素;探讨了应用4D技术建设数字流域空间数据框架的可行性和实践意义。
The first step of constructing digital watershed is deciding the structure of watershed's spatial data frame and its building method, so as to make sure the digital watershed including enough and easy spatial data to process.4D technology shows predominance by its products,and the method which 4D products are used as basic frame of digital watershed has been spread in Loess Plateau watershed.4D products'roles and significations in digital watershed,the flow of building digital watershed by 4D technology suitable to watershed and the factors which influence precision and efficiency are all presented,and the feasibility and practice are discussed.
出处
《水土保持研究》
CSCD
北大核心
2005年第3期99-100,153,共3页
Research of Soil and Water Conservation
基金
国家"十五"重大科技攻关课题(2001BA606A-4)
关键词
4D技术
数字流域
实践与研究
D technology
digital watershed
practice and study
