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Research and Implementation of Map Symbols Visualization in 3D GIS Based on Texture Mapping

Author: WeiXianFeng
Tutor: WeiDong
School: Shenyang University of Technology
Course: Applied Computer Technology
Keywords: Three-dimensional GIS Texture Mapping Map symbols Mipmap
CLC: TP391.41
Type: Master's thesis
Year: 2011
Downloads: 62
Quote: 1
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Abstract


The development of GIS ( geographic information system) after 30 years , the traditional two - dimensional geographic information system has been made ??in the development of two-dimensional display is simple and direct, many well-known map software is a two-dimensional plane as the main display way . Three-dimensional GIS evolved on the basis of the two-dimensional GIS , is a very important one in the integration of GIS technology . Compared with the traditional two-dimensional GIS , 3D GIS spatial information display is more intuitive , the show is more abundant , with a strong multi-dimensional spatial analysis functions . Map symbols map language , the conventional abstract representation of geographic information . The development of the two-dimensional GIS , the drawing of the map symbols and to develop long-term development has formed a set of standards , has also been widely used in GIS . For the standard map symbols has been formed in the three-dimensional GIS should also continue to use in three-dimensional GIS map symbol accurate expression of this issue is the main research contents . The paper , based on the characteristics of the map symbols map symbols stored in the image texture mapping symbolic expression , used in the process of expression of a set of corresponding technical means to deal with the problems arising from the texture mapping process : combined with the characteristics of the DEM data using a regular grid model of three-dimensional terrain modeling ; characteristics of high accuracy requirements for location information for geographic information systems , will solve the registration problem between the individual layers and terrain model as the primary solution to the problem ; ensure that the location information of the layer registration , texture synthesis the map symbol layer and landscapes layer fusion ; 3D terrain generation , terrain model surface uplift for the terrain triangulation texture may produce distortion the problem of using the interpolation method for processing, generating patches texture zoom back Refine texture distortion using Mipmap pre-filter for processing . Finally, under the system of the above techniques implementation process , using the modular development on various features of the system design and development, 3DGIS map symbols visualization as an experimental platform and important module is added to the system .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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