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Research on Dynamic Generation of 3D Road Geometry Using GIS Data

Author: XieFang
Tutor: ZhouJianZhong；LiLiJun
School: Huazhong University of Science and Technology
Course: System Analysis and Integration
Keywords: VRGIS Road entities generated Buffer boundary algorithm ArcObjects Vega OpenGL
CLC: TP399
Type: Master's thesis
Year: 2005
Downloads: 215
Quote: 1
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Abstract


With the continuous progress of information technology , the construction of digital cities are also deployed globally . Interlinkages between time and space in the city is getting closer , the function of the city began a major change , urban planning into a digital age , we use the latest information technology to carry out the design and management of urban planning . Play an increasingly larger role in the process VRGIS are urban planning . Based on virtual reality technology immersion , interaction , and imagine the characteristics previously only flat panel display urban road planning program 3D visualization . Establish a virtual simulation environment in which to implement multi- way movement feel the urban space , and can also provide real-time multi- program comparison . This paper studies the content is dynamically generated based on VRGIS technology road model . Of urban the road centerline planning program processing , GIS basic data is generated , and in the buffer boundary generated algorithm in two-dimensional road profile calculated , in three-dimensional contour data in real-time to generate realistic 3D road model . This article focused on solving the problem is how the three-dimensional scene the road entity formation , as well as seamless combination between entities . Including the generation of the curve of the road , some models of three-dimensional in the road bends processing and simple road cross processing . In the analysis of the actual situation of the road various proposed separately angle bisector algorithm to solve the problems of road bends ; Douglas-Peucker algorithm , take the appropriate threshold to fit polyline curve road ; decomposition method to achieve a simple road intersection . The above solution to achieve the \We make use of the existing road planning data through the coupling of the two-dimensional and three-dimensional module , above in VRGIS technology , demonstrated a true three-dimensional scene in the planning and implementation of the road , using intuitive visual effects for future planning, and assessment services .

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