Research On The Evolution Of Guangzhou Urban Spatial Pattern Based On Object-oriented And Landsat Images

With the rapid development of economy and the level of urbanization,the population gathered to the city to promote the city to expand outward.The expansion of urban space can promote the prosperity of GDP growth and bring more jobs and urban living space,but also bring about the sharp drop of cultivated land resources,environmental pollution and economic bubble and other aspects of the problem of urban expansion has become Geological neighborhood concerns and research hotspots.The use of satellite remote sensing technology to obtain real-time urban spatial information,the local government can grasp the evolution of urban spatial pattern,land resources supervision and urban planning and construction to provide valuable information.In this paper,Guangzhou city as the research area,the use of object-oriented image classification method integrated RS,GIS technology and statistical theory of Guangzhou city spatial pattern evolution research.The main research work is as follows:(1)Using object-oriented classification theory and traditional traditional classification method,the comparison between the theoretical analysis and the experimental results shows that the object-oriented method is superior to the traditional classification method in remote sensing image classification.(2)For the landsat series of satellite images,the object-oriented classification technique is used to optimize the segmentation method,the segmentation scale and the feature index.The results show that the object-oriented method is applied to the landsat series satellite image The classification is superior to the traditional classification method.(3)Using the object-oriented method to extract the land use classification of the landsat series of image data of Guangzhou City in 2005,2010 and 2015,and obtain the change of construction land in Guangzhou City in ten years.Then,based on Arcgis10.1technology,Construction land vector map for superposition analysis,dynamic display of the spatial pattern of the built area.(4)The potential factors of urban spatial expansion in Guangzhou are excavated,and the evolution of urban spatial pattern in Guangzhou is qualitatively and quantitatively analyzed.This paper analyzes the urban expansion of Guangzhou by analyzing the data of population,economy and road area of Guangzhou,and finds outthe potential factors of urban expansion by finding Guangdong Province Statistical Yearbook,Guangzhou Statistical Yearbook and Guangzhou Bureau of Statistics Data for quantitative analysis.Finally,SPSS19.0 is used to analyze the principal components and construct the principal component scoring model.The results show that the urban driving force factor of Guangzhou can be classified into two main components:internal driving factors such as national economy and population,and internal driving factors such as urban roads,airports and ferry.