학술논문
三角网的生成与简化算法 / The Establishment and Simplification Algorithm of TIN
Document Type
Academic Journal
Author
Source
地理学与国土研究 / GEOGRAPHY AND TERRITORIAL RESEARCH. 17(1):69-86
Subject
Language
Chinese
ISSN
1672-0504
Abstract
在三维地理信息系统的开发与研究中，要求三角网模型的支持，而高效的三角网生成算法是三角网模型的基础。该文综述各类三角网的生成算法，对以往被人忽视但简明高效的算法——径向扫描算法进行阐释，并对它的实现进行改进；对地形数据的简化及建立地形层次对象模型是实现高效的三维地理信息系统的关键，而三角网的简化是地形数据简化的基石之一，文中提供三种简化三角网的算法供同行讨论；并在微机上实现上述算法。
The support of TIN model is required in the development and research of 3D GIS, while an efficient TIN algorithm is the foundation of the TIN model. After presenting various algorithms on TIN, the radius-scan algorithm, which is simple and efficient and used to be neglected, is discussed and some improvements on it have been made. The key to high efficient 3D GIS is to simplify the topographical data and to build hierarchical object model, while the TIN simplification is the base of data simplification. Three algorithms for TIN simplification are offered to discuss. All algorithms above are implemented on PC.
The support of TIN model is required in the development and research of 3D GIS, while an efficient TIN algorithm is the foundation of the TIN model. After presenting various algorithms on TIN, the radius-scan algorithm, which is simple and efficient and used to be neglected, is discussed and some improvements on it have been made. The key to high efficient 3D GIS is to simplify the topographical data and to build hierarchical object model, while the TIN simplification is the base of data simplification. Three algorithms for TIN simplification are offered to discuss. All algorithms above are implemented on PC.