摘要
虚拟地理环境是人类社会环境和自然环境在计算机三维虚拟空间的映射.是近20年来随着信息技术进步而迅速发展起来的研究领域。“原型黄河”、“模型黄河”、“数字黄河”则是基于地理信息系统、三维可视化技术、现代遥感遥测技术和虚拟地理环境技术的发展而提出来的。通过概述“数字黄河”的研究意义、研究方法,探讨了“数字黄河”研究需要解决的关键技术问题.包括自然环境中“原型黄河”各有机组成部分在虚拟地理环境中的表达及行为描述.自然环境和人类社会环境对黄河具有重要影响的因子之间相互作用的计算机表达。以“数字河道模型”为例详细论述了“数字黄河”的重要组成部分,如“数字河道模型”、“数字流域模型”、“数字水库模型”和“数字河口模型”在虚拟地理环境的表达。
The Yellow River is the second largest river in China and the most complex and refractory river in the world, which has prominent characteristics different from other great rivers. The main sticking point of Yellow River is the bedload, where the amount of water is less than that of bedload. The grievous water and soil erosion of Loess Plateau conduces to the lower reaches of Yellow River deposit and makes the riverbed higher and higher in thousands of years. All these make the Yellow River become a famous hanging river. Virtual Geographic Environments (VGE) includes the mapping of human society environment and natural environment in the computerized three-dimension space, which is developed rapidly following the information technology advancement in recent 20 years. 'Prototype Yellow River', 'Model Yellow River' and 'Digital Yellow River' are propounded based on the development of geographic information system, 3D visualization technology, modern remote sensing and VGE technology. The research significance and research methods have been summarized in this paper. In the mean time, the paper has discussed the key technology problems of 'Digital Yellow River' research, which includes the computer expression, the behavior depict and more factors influencing the Yellow River in natural environments and human society environments. A crucial portion, 'digital channel model', is exampled here to picture the 'digital drainage basin model', 'digital reservoir model', 'digital bayou model' in VGE.
出处
《地理科学进展》
CSCD
北大核心
2005年第3期91-100,共10页
Progress in Geography
基金
科技部基础性工作专项资金"中国地球系统科学数据共享服务网建设"编号:2004DKA20180。
关键词
数字黄河
模型黄河
河道模型
3D
可视化
虚拟地理环境
digital Yellow River
model Yellow River
3D visualization
virtual geographic environments
