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3维城市模型的数据获取方法评述 总被引:12,自引:1,他引:11
随着GIS向3维领域的不断发展,3维城市模型的研究近年得到了飞速的发展,人们在3维对象建模、基于影像的对象重构以及数据获取方面进行了较深入的研究,其中以对数据获取的研究最为广泛且深入,由于3DCM(City Model)的建立需要大量的第3维空间数据和纹理数据,如何高效批量地获取这些数据,是3DCM构造的重要前提,通过查阅大量文献,对目前有关3DCM的数据获取的方法进行了评述,指出了目前3维城市模型数据获取的合理途径。 相似文献
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3维地面模型的可视化研究 总被引:6,自引:0,他引:6
在对巳有的3维地面模型进行分析的基础上,论述了3维地面模型的各种数据结构,并着重以DEM矩形格网为例探讨了地面模型的构造方法,以及在此基础上的动态显示和交互操作等功能。最后给出了具体实例。 相似文献
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在对已有的 3维地面模型进行分析的基础上 ,论述了 3维地面模型的各种数据结构 ,并着重以DEM矩形格网为例探讨了地面模型的构造方法 ,以及在此基础上的动态显示和交互操作等功能。最后给出了具体实例 相似文献
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城市大区域3维建模初探 总被引:1,自引:1,他引:1
在对已有3维数据模型分析的基础上,引用制图综合思想,着重探讨快速构建城市大区域建筑物的数据模型,提出一种箱式分割数据模型来构造建筑物。其中的分割是对建筑物实体的分割,这样可以在3维GIS中直接实现对建筑物的每一层或每一用户的图形属性互查及各种分析。最后,在此模型的基础上提出一种城市大区域快速3维建模思路。 相似文献
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城市是人类生活的重要聚集地,是人类文明成果产生、传播和发展的主要场所。随着“数字城市”理论的不断完善,构建数字城市3维可视化系统已成为地理信息系统领域的研究热点。本文依据系统开发的原则,结合“数字城市”建设的实验,对数字城市3维可视化系统的总体设计、数据处理、3维模型制作、3维场景生成以及系统功能实现等多个方面进行了综合性的研究。 相似文献
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一种3维建筑物模型的数据描述及采集方案 总被引:1,自引:0,他引:1
随着“数字地球”、“数字城市”概念的不断深化,作为“数字城市”最基础、最关键的技术,3维城市模型数据的制作已经成为数字化测绘的新技术亮点。本文介绍了一种3维城市建筑物模型的数据存储结构,详细阐述了不同类型3维建筑物的采集方法,由此总结出3维建筑物模型数据的生产、存储、表述的完整方案。 相似文献
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提出一种建筑物自动化提取架构,基于DeepLabv3+网络模型,使用WHU建筑物数据集,完成数据集增强、
模型训练、建筑物提取以及精度评估。实验表明,架构中DeepLabv3+模型分类的总体精度为96.3%、准确度为
94.2%、召回率为92.5%、F1得分为93.3%、交并比为87.5%,优于基于像素的分类方法(支持向量机、K均值聚类
算法(K-Means))和面向对象的分类方法(最邻近节点算法(KNN)、分析与回归树)以及基于深度学习的分类方法
(UNet、SegNet、PSPNet)。文中构建的高分辨率遥感影像建筑物自动化提取模式,可以完成建筑物高精度高效率的
提取任务。 相似文献
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New development in urban planning, cityscape, real estate management and the like, calls for new demands for 3D city model. There are so many objects in 3D city model such as building, river, road, and so on. The building model is very important in 3D city model. In recent years, a lot of research work about visualization has been done. In our opinions, visualization is only a part of 3D city model, while interactive operation about buildings is rather important as well. In order to implement interactive operation (create, edit, query, etc.), good data structure and model must be developed. 相似文献
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分析了传统城市三维建模的现状及存在的问题,指出了BIM技术应用于城市规划的重要性,同时探讨了基于BIM技术的城市三维模型系统的设计模式。将BIM技术与传统三维建模技术、地理数据库等相结合,建立建筑BIM模型,促进城市三维建模技术的创新发展,同时建筑BIM模型可嵌入城市规划项目BIM模型,贯穿于项目全生命周期,为城市规划者和管理者提供信息化的高效、便利的手段。 相似文献
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YANG BishengLI QingquanLI Deren YANG Bisheng Doctoral Candidate National Laboratory for Information Engineering in Surveying Mapping Remote Sensing WTUSM Luoyu Road Wuhan China 《地球空间信息科学学报》1999,2(1):109-114
New development in urban planning, cityscape, real estate management and the like, calls for new demands for 3D city model. There are so many objects in 3D city model such as building, river, road, and so on. The building model is very important in 3D city model. In recent years,a lot of research work about visualization has been done. In our opinions,visualization is only a part of 313 city model, while interactive operation about buildings is rather important as well. In order to implement interactive operation (create , edit, query,etc. ), good data structure and model must be developed. 相似文献
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3维模型的构建是城市3维地理信息系统建设的核心。介绍了基于现有数据资料制作城市3维模型的工艺流程,重点研究了利用城市大比例尺3维DLG数据批量获取建筑物高度的新方法和贴图制作过程。按照上述制作工艺和方法较好地解决了大面积城市3维建模这一问题,生成的模型具有很高的精度,完全满足城市3维建模的精度要求。 相似文献
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扬州经济开发区三维演示系统研制 总被引:3,自引:0,他引:3
提出建立城市三维演示系统的一套技术流程,并针对其中的主要环节提出了可行的优化解决方案。该流程从房产数据、国土数据和规划数据等基本数据出发,利用数据分层存储的特性抽取有关建筑物、道路、水系及地形的空间数据和属性数据,并与实际采集的纹理数据结合起来,生成高分辨率城市三维演示数据。以此为基础建立城市三维演示模型。并利用VisualC 6.0和Open GL开发了三维演示模块。实现城市三维数据的逼真演示。在该流程的支持下,建立了扬州经济开发区三维演示系统,验证了技术的可行性和有效性。 相似文献
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Highly detailed 3D urban terrain models are the base for quick response tasks with indispensable human participation, e.g., disaster management. Thus, it is important to automate and accelerate the process of urban terrain modeling from sensor data such that the resulting 3D model is semantic, compact, recognizable, and easily usable for training and simulation purposes. To provide essential geometric attributes, buildings and trees must be identified among elevated objects in digital surface models. After building ground-plan estimation and roof details analysis, images from oblique airborne imagery are used to cover building faces with up-to-date texture thus achieving a better recognizability of the model. The three steps of the texturing procedure are sensor pose estimation, assessment of polygons projected into the images, and texture synthesis. Free geographic data, providing additional information about streets, forest areas, and other topographic object types, suppress false alarms and enrich the reconstruction results. 相似文献
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Sam Amirebrahimi Abbas Rajabifard Priyan Mendis Tuan Ngo 《International Journal of Digital Earth》2016,9(4):363-386
Flood damage assessment (FDA) is a key component of risk-based method for flood management. In the current FDA approaches, generally the uniqueness of the building is disregarded in the analysis. Therefore, they are unfit for detailed applications in which case-by-case analysis of building damage is an essential requirement. This limitation is compounded by the use of incomplete and often low-quality data inputs about the building and the assumptions and approximations made regarding the geometry and materials of its components. Such shortcomings may result in incomplete and uncertain outcomes. Considering the benefits and increasing use of three-dimensional (3D) urban modeling and Building Information Model in various urban management processes, in this paper, an integrated framework for utilization of detailed 3D building models for the assessment and 3D visualization of flood damage to building according to its distinct behavior against flood is presented. A proof-of-concept demonstration of the framework in a case study underlined the feasibility of implementation of the framework, which can potentially benefit a variety of users and be used as a complementary approach to the current FDA methods for improving the resilience of the community toward floods and their adverse impacts. 相似文献