Research On The Road And Residential Area Extraction And The Optimization Of Layout Based On Multi-source Remote Sensing Data

With the rapid development of the era of big data,the use of multi-source remote sensing image data has great significance on the current research of the present urbanization development,digital city and regional land use data updating,and other fields.Road of overall layout and the development of residential areas are interlinked.Furthermore,the information extraction of both and optimization of the layout research,can not only benefit regional social and economic development,but also strengthen the land management,improve the efficiency of land use and the sustainable development.This dissertation clarifies the extraction model building by the rule of characteristic differences of field spectra in the image,quantitative analysis of relevant measurements and evaluation and layout optimization study on roads and settlements distribution.The research results mainly include the following aspects:(1)The establishment of the extraction model of different ground objects based on the difference of different spectral reflectance curves of multi-source remote sensing images.During the process of the classification of visual interpretation,the images were classified on the basis of the villages and towns,villages,forest land,cultivated land,rivers,pits,flood land roads,highways,railways,other roads and other different features,to analyze the subtle difference of reflectivity of different ground features.(2)Modeling to extract feature information whose accuracy was pretty ideal.The comprehensive extraction accuracy of the road information,which was extracted by sampling method from Landsat8 remote sensing images,high score 2 remote sensing images and resource 3 images,were 81.25%,89.65% and 81.25% respectively.However,the extraction results of three kinds of remote sensing images are all lower than the road extraction results.In general,Landsat8 remote sensing images have more comprehensive advantages,as they are not only easy to obtain,but also its comprehensive accuracy of the extraction results is around 80%,which can be applied to the research by manual correction.(3)The overall elevation of the town are relatively high,but topographic relief is small,and the distribution of settlements is relatively uniform.It can be found,by Introducing topographic position index,distribution index and information entropy index to quantitatively calculate the distribution characteristic measurements of all roads and residential areas in Zengkou town,that generally terrain index in southern area is significantly less than the north,especially low and obvious in the town and its surrounding area.(4)The accessibility of some villages in the research area needs to be further improved,and the overall development potential of residential areas is relatively large.And we found,on the basis of measuring distance of residential areas of 50 meters,100 meters and 150 meters far from highway,that that the residential area scale is larger and the road accessibility is better of Longtan village,Shutai village,Shixi village and Shouxing village while those of Huangliangshu village and Kangliang village,whose dominance degree is in the medium and remains further improvement,are not as good as them.Meanwhile,the comprehensive influence scores between 50-65 of residential plaques in the whole Zengkou town are more,with a patch proportion of 51.57%,illustrating a good development momentum of the residential area in the town and a large potential in residential areas consolidation.(5)Centering on town,the comprehensive influence of the village weakens in the direction of the concentric circles toward the southeast and southwest.Based on the study of the layout optimization of the road and residential areas in Zengkou town,it is found that the optimization layout of the town combined the overall development of the whole town with the local preferential development.We will gradually accelerate the overall planning of urban and rural areas,and appropriately introduce relocation development model?On one hand,the center effect of Longtan village,Shutai village,Shixi village and Shouxing village must be strengthened.On another hand,the traffic development of such outside villages as Huangliang village,Kangcun village and Yuanyi village must also be strengthened to drive concentrated development of the residential areas.