| The first national survey of national geography has been completed by the end of 2015.On the basis of all factors,full coverage and consistent geographical conditions,the continuous and comprehensive geographical conditions monitoring has been carried out comprehensively.The most important way to obtain urban geographical conditions is to carry out the monitoring of the geographical conditions of the city.The object of this survey is the surface nature and human geography elements in the land area of China.The elements of natural geography include the categories,positions,ranges and areas of the elements such as topographic landforms,vegetation cover,water,desert and bare land,etc.,and master their spatial distribution,and the elements of human and geography are closely related to human activities.The relevant traffic network,residential areas and facilities,geographical units and other elements of the category,location,scope and so on,and grasp the spatial distribution of the status quo.Through the obtained national data and the city data,the information is processed and extracted to the maximum,and the analysis and service ability of the urban overall planning are promoted.Through the statistical and comparative analysis,the changes and evolution laws of the urban development are revealed,and the reasonable opinions and suggestions are put forward for the overall planning and long-term planning of the city,and the future will be sent to the future.The direction of the exhibition is scientifically analyzed and predicted,and the scientific basis of reference information and decision support are provided for the government,management institutions and all walks of life to meet the needs of the economic and social development and the construction of ecological civilization,and to improve the service ability of the geographic information to the government,the enterprises and the public.This paper,based on the survey data of geographical conditions,based on the study of urban area scale,investigates urban land use in many data by geographical conditions,and takes the theory and method of suitability evaluation of urban construction land as the premise.First,through the GIS related software to study the geographical situation survey data of the research area to get the Xining city natural factor status map,then the Xining city national conditions data are extracted and classified.Then,the influence factors,the screening evaluation factors and the evaluation index of the suitability evaluation of the urban construction land for the study area are established.Based on the analysis of natural factors,ecological factors,socioeconomic factors and the suitability of restrictive factors,based on the support of the CIS related software,the system is used to quantitatively analyze the selected indexes and make the grading diagrams of each evaluation factor,and to determine the suitability of the comprehensive evaluation by 1-9 points and 22 contrast methods.Then the AHP method is used to determine the weight of the index,and then the suitability classification of the research area is obtained by the weighted superposition method,and the evaluation results of the research area are analyzed,the suitability partition is delineated,and the suitability grade of the urban construction land in Xining is analyzed.In the end,the comprehensive evaluation results are compared with the established areas in Xining which have been processed before,and the rationality of the layout and arrangement of the construction land in the overall urban planning is analyzed,and whether the urban comprehensive evaluation grade is consistent with the urban comprehensive evaluation grade is provided,and the scientific opinions and suggestions are provided for the new round of urban overall planning and development direction.At the same time,it also broadens the application of census data of geographical conditions. |
PDF Full Text Request