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排序方式: 共有188条查询结果,搜索用时 515 毫秒
41.
本文就如何提高大比例尺地形图数字化速度,提出了几种简便而又实用的方法.灵活运用这些方法,可以较大地现高数字化速度. 相似文献
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介绍了防雷工程CAD辅助设计系统的总体构思、技术方法和功能特点,从而为地方台站提供参考. 相似文献
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对目前我国CAD平台软件正版化的现状及发展进行了较为详细的分析及探讨,对软件正版化的认识进行了阶段划分,并提供了实施CAD平台软件正版化的解决方案。 相似文献
45.
针对重力式码头CAD系统开发中存在的设计荷载处理的技术难题,提出了一种切实可行的计算机解决方案,并提供了CAD系统常用的数据接口技术。该方案有较强的应用价值,可作为开发各类重力式码头CAD系统的借鉴。 相似文献
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C. L. Ogleby 《The Photogrammetric Record》1999,16(94):651-670
For in excess of 100 years, photogrammetry has played a significant role in documenting the cultural heritage of nations and peoples. Many recent advances in the technique have enhanced the use of photogrammetry as a recording tool, enabling more complex representations of objects and moving access to the procedure from the expert to the interested user. Some of these recent developments include low cost digital photogrammetric systems, image sequence analysis, bundle adjustment and camera calibration procedures, and three dimensional laser scanning. An overview of some of these developments is given in this paper. The University of Melbourne, in conjunction with Chulalongkorn University in Bangkok, has been working on a project to create a computer visualization of the ancient Thai city of Ayutthaya. This project has blended three dimensional CAD models of the architectural features of Ayutthaya with historical research and artistic rendering to build a realistic representation of this city as it may have existed in the past. The model of the city has been built up from historical “maps”, aerial photographs, field survey and the use of photogrammetry to derive models of individual wat, chedi, prang (see GLOSSARY) and statuary. The historical research conducted in Thailand has provided the basis for the determination of the most likely location and appearance of the missing structures. The CAD models created from the photogrammetry have been visualized by the addition of surface textures and materials and rendered in as realistic a manner as possible. The virtual city has also been augmented by the incorporation of live actors in the computer reconstruction. When completed, the end product will be capable of producing an experience of daily life in Ayutthaya, with the potential for giving the user a level of interaction. The reconstruction will also be used as the basis of a variety of educational products to be produced in Thailand on a number of different media, including a bilingual CD-ROM already developed to “proof-of-concept” stage. 相似文献
47.
The Department of Geomatics and the Regional Centre for Innovation in Engineering Design in the University of Newcastle upon Tyne collaborated in a project to produce precise measurements for use in the fabrication of the body of the "Angel of the North" sculpture. This 20 m high edifice, by the sculptor Antony Gormley, is located adjacent to the A1(M) in Gateshead, Tyne and Wear.
This paper reviews the photogrammetric reverse engineering work carried out on a 1:10 scale plaster maquette of the "Angel of the North", which is a life-size model of the sculptor's body without any arms. The three dimensional measurements of the maquette, made by analytical photogrammetric techniques, were then processed to produce a fully functional three dimensional CAD model from which the dimensions needed by the fabricating company, Hartlepool Steel Fabrications Ltd., could be extracted. Additionally, the VirtuoZo digital photogrammetric software package was used to investigate the potential of automated measurement for this type of work and the results were compared with those obtained analytically. 相似文献
This paper reviews the photogrammetric reverse engineering work carried out on a 1:10 scale plaster maquette of the "Angel of the North", which is a life-size model of the sculptor's body without any arms. The three dimensional measurements of the maquette, made by analytical photogrammetric techniques, were then processed to produce a fully functional three dimensional CAD model from which the dimensions needed by the fabricating company, Hartlepool Steel Fabrications Ltd., could be extracted. Additionally, the VirtuoZo digital photogrammetric software package was used to investigate the potential of automated measurement for this type of work and the results were compared with those obtained analytically. 相似文献
48.
简要介绍了Auto CAD的特点及其在矿井地质图件绘制中的应用技巧,阐述了完成一幅地质图件的基本步骤,推荐了钻孔平面图绘制的专业化程序。 相似文献
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地籍数据建库方案的探讨 总被引:2,自引:0,他引:2
通过对建立"地籍数据库"的一些体会和认识,探讨地籍数据转换、CAD图形系统生产的矢量数据转换到地籍数据库中的一些技术路线,探索利用CAD系统生产地籍数据库的方法. 相似文献