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Research of Urban Road Network Evaluation Technology Based on RS and GIS

Author: ZhouZuoZuo
Tutor: ZhouZhenHong
School: Zhengzhou University
Course: Geotechnical Engineering
Keywords: Urban road network Evaluation techniques RS GIS Geodatabase Data Model
CLC: P208
Type: Master's thesis
Year: 2009
Downloads: 104
Quote: 2
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Abstract


With the rapid development of urbanization, motorization, urban road traffic facing increasingly serious challenges, an urgent need to be based on scientific concept of development, the concept of sustainable development, to reflect on the city planning and construction of the road network and its crux of carry out urban road network evaluation technology research, scientific analysis and evaluation of the urban road network system, to provide a scientific basis and technical support for further adjustment, the construction of urban road network. Evaluation of the urban road network, requires a lot of manpower and material resources in various junctions manual monitoring and statistical data update cycle is long, the road network status can not pass judgment quickly. Therefore, this study engineering background to the road network of the tourist city of Haikou, the use of remote sensing (RS) real-time characteristics of mass information quickly collect road network information; powerful geographic information system (GIS) spatial analysis capabilities, efficient organization, management of the road network data, to real-time, accurate and efficient evaluation of the urban road network: (1) the establishment of road network evaluation index system. Reality from the evaluation of the urban road network, taking into account the size, structure and transport function of the road network, based on the principles of scientific testability and comparability in the RS and GIS technology, the establishment of the density of the road network, the grade level with 9 indexes reasonable evaluation index system of urban road network, in order to more fully reflect the overall performance of the urban road network. (2) remote sensing image processing. Taking into account the accuracy of the information requirements of the urban road QuickBird high-resolution remote sensing images. Erdas 8.7 of remote sensing images linear stretching, to enhance the image of the layering. By improving the brightness and contrast, to increase the difference between the different objects. Through the high pass filtering process, to enhance the different objects boundary, and removing the interference information, so as to clearly delineate feature boundary. Finally, select the projection system and the control points, and geometric correction and registration, good for city roads digitized images ready. (3) road digitized. Use of the the MapInfo 7.0 platform digitized advantage to digitize and organize city road data. Specification and the actual situation of Haikou road, the road is divided into a main road, secondary roads and slip three, respectively, to be digitized, and the establishment of the attribute data table based on the city roads, the road network data map display function, building a database for the road database lay the foundation. (4) Road Building the Database. The the ArcGIS Geodatabase new data model, the elements of the relationship to efficient and accurate extraction of road and vehicle information, and quick access to the evaluation of the required data, it is building a database with its road database. Based on the the Geodatabase model elements, the rational design of road database structure, and load road data, organizations topological relationships, generate traffic network datasets, and establish a road database. (5) Evaluation of the results. Haikou City, the main road density of 1.230 km / km ~ 2, the density of secondary roads 1.214km/km ~ branch density of 3.455 km / km road network density of 5.8998 km / km ~ 2, density of road network is 2.4445 km / km to 2 roads spacing of 818.200 m, 22.6% of the area density of the road network, road area per capita is 6.119 m to the road level gradation 1:0.987:2.809. The results show that: in Haikou City, the existing road, the main road and branch is able to meet the local road traffic, the socio-economic development needs of secondary roads is just basically meet the development needs. In this study, the evaluation of RS and GIS technology into the urban road network, after all, the innovation of the research methods. This study greatly improved the traditional evaluation tools and deepen the content of the road network evaluation technology research, to promote the evaluation of road network to the combination of qualitative, quantitative and positioning direction. How scientific quantitative impact indicators of the social environment of the road network, a pending further explore the topic.

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CLC: > Astronomy,Earth Sciences > Surveying and Mapping > General issues > Mapping database and information system
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