The GDP Spatialization In Zhejiang Province Based On DMSP-OLS Data And Land Use Data

With the continuous development of economy,the research on various economic indicators has become more and more in-depth.Among all economic indicators,GDP can reflect the economic fundamentals of the statistical area relatively intact.The spatialization of GDP can obtain the data of small area grid GDP density,it can reflect the distribution difference of GDP in the region more carefully and truthfully than the original data of GDP in the statistical range of the administrative unit.At the same time,the process of economic development can be observed more directly by comparing the GDP density map for years of study.The night light data is closely related to the lighting of the production activities of the second and third industries,therefore,the GDP prediction model and GDP density map constructed with this data has high accuracy and reference value.However,at present,the study of the spatialization of GDP based on night lighting largely remain the research into distribution difference.Lack the contrast research of large time span and integration of other geographic data comprehensive spatial model construction;the analysis and guiding significance of the spatial results are also seldom discussed.The time span of this study was 22 years from 1992 to 2013,during this time,we can obtain unified DMSP/OLS night light image data which could be mutually calibrated from NOAA.as to the study area,Zhejiang province was chosen in the study because of its high proportion of secondary and tertiary industry output value and unbalanced economic development.The data are corrected by mutual correction and continuous correction,the best simulation model was obtained by selecting the appropriate index of light index and GDP to conduct correlation analysis;the spatialization of GDP is realized by means of these data and image,then get the GDP density map.The main results of the study are as follows:First,a GDP prediction model based on night lighting was constructed for the first time in longitudinal time dimension,draw a GDP density map that can dynamically reflect the economic development process of Zhejiang province.Constructs the first industry GDP forecast model of Zhejiang province based on land use data between 1992 and 2013;constructs the second and third industries GDP forecast model of Zhejiang province based on DMSP/OLS night light data.Draws the GDP density map of the second and third industries from 1992 to 2013.Second,on the horizontal dimension,this paper constructs the GDP prediction model based on the GDP data of each city in Zhejiang province and the light image data of the night in 2013,draws a GDP density map that can reflect the economic distribution difference in Zhejiang province.Third,this paper analyzed the results of spatialization of GDP obtained in both directions in time and space dimensions,obtained the spatial and temporal laws of economic development in Zhejiang province and the spatial laws of economic distribution in Zhejiang province.This study also has created an urban economic level classification method that can simultaneously reflect the level of urban economic growth and the level of internal economic difference by comparing of this two spatialization results comprehensively.Based on the above analysis,this paper proposes some suggestions on the balanced development of economy in Zhejiang province.This study has realized the spatialization of Zhejiang province's GDP based on the DMSP/OLS night light index with a continuous,comprehensive thinking.Models'fitting degree,R ^ 2 are around 0.9,up to 0.965,so,the models' accuracy is high,are worth reference.In short,this paper reveals the development process and distribution difference of Zhejiang province,and provides a comprehensive view of the time dimension and spatial dimension for the study of economic development in Zhejiang.