共查询到11条相似文献,搜索用时 62 毫秒
1.
地理信息系统(GIS)是一种功能强大的分析工具,目前其功能的应用开发仍不充分.本文以美国辛辛那提交通规划研究为例,结合GIS,用计算机动画进行可视化研究.研究交通规划中拥挤程度、CO浓度的三维表现、评估方法.结合Arcview及其3-D分析挂件、AutoCAD和3DSMAX,把传统的用数字、文字描述的评估结果用二维或三维场景、虚拟动画的形式,以友好的用户界面形象地表现出来,以利于专业人士与决策者、市民之间的交流,模拟不同规划方案的实施效果,提供决策的依据. 相似文献
2.
工程场地地震液化势三维模型的建立及可视化研究的目的是用三维图形来描述地震动作用下场地液化势的空间分布特性,以此为城市防震减灾工作提供相应的支持。采用具有概率意义的饱和砂土抗液化强度经验公式来对场地进行地震液化势概率评价;采用一种基于"块"模型的数据结构来描述场地液化势三维实体;结合Kriging插值法和体视化技术进行场地液化势的三维可视化建模。研究表明:采用"块"数据模型来分割模拟三维液化势场,利用Kriging法对工程场地地震液化势进行空间数据三维插值,有助于揭示勘探孔以外任意空间点的土层液化势信息;基于液化势概率评价结果和体视化技术,采用Kriging插值法,以不同的色标体现场地液化势的风险程度,可以直观的三维图像形式呈现场地液化势的空间分布特性和变化趋势,通过剖切自动生成指定位置的二维剖面和三维切割体,工程场地液化势的三维分布特性得到有效的表达。 相似文献
3.
Manoj K. Jha Cyrus McCall & Paul Schonfeld 《Computer-Aided Civil and Infrastructure Engineering》2001,16(6):399-414
A model for highway development is presented, which uses geographic information systems (GIS), genetic algorithms (GA), and computer visualization (CV). GIS serves as a repository of geographic information and enables spatial manipulations and database management. GAs are used to optimize highway alignments in a complex search space. CV is a technique used to convey the characteristics of alternative solutions, which can be the basis of decisions. The proposed model implements GIS and GA to find an optimized alignment based on the minimization of highway costs. CV is implemented to investigate the effects of intangible parameters, such as unusual land and environmental characteristics not considered in optimization. Constrained optimization using GAs may be performed at subsequent stages if necessary using feedback received from CVs. Implementation of the model in a real highway project from Maryland indicates that integration of GIS, GAs, and CV greatly enhances the highway development process. 相似文献
4.
5.
6.
7.
8.
9.
10.