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基于DMSP-OLS燈光數(shù)據(jù)的廣東省城市人口估算

發(fā)布時間:2019-04-16 10:57
【摘要】:使用DMSP/OLS近20年數(shù)據(jù)對廣東省城市的人口規(guī)模進(jìn)行估算.首先,對廣東省的DMSP/OLS數(shù)據(jù)進(jìn)行校正.以2000、2010年人口普查數(shù)據(jù)與燈光數(shù)據(jù)為樣本,構(gòu)建"灰度密度-人口密度"模型,估算廣東21個地級市常住人口.該模型既充分考慮灰度閥值的設(shè)定對人口估算結(jié)果的影響,又考慮城市人口數(shù)量變化在燈光灰度總值和燈光覆蓋面積這2個變量上的體現(xiàn).由于使用燈光數(shù)據(jù)指標(biāo)與人口數(shù)據(jù)指標(biāo)的比值作為估算基礎(chǔ),各城市的估算函數(shù)參數(shù)均不同,符合各城市經(jīng)濟(jì)發(fā)展?fàn)顩r和人口分布特點(diǎn).通過2005年全國1%人口抽樣數(shù)據(jù)檢驗(yàn),21個地級市平均估算相對誤差為3.69%,全省總常住人口估算相對誤差為5.02%,證明該模型能有效地估算廣東省各地級市的人口規(guī)模.與已有的人口統(tǒng)計(jì)數(shù)據(jù)獲取途徑相比,該文構(gòu)建的模型比傳統(tǒng)的人口統(tǒng)計(jì)方法增強(qiáng)了時效性,又比其他遙感估算方法節(jié)省了地物判讀和解譯的步驟,且估算誤差更小.基于DMSP/OLS數(shù)據(jù)的城市人口估算對研究中國城市人口規(guī)模具有重要的應(yīng)用價值.
[Abstract]:The population size of cities in Guangdong Province was estimated using DMSP/OLS data for nearly 20 years. Firstly, the DMSP/OLS data of Guangdong Province are corrected. Taking 2000 and 2010 census data and lighting data as samples, the "gray density-population density" model is constructed to estimate the resident population of 21 prefectural cities in Guangdong province. The model not only considers the influence of the setting of gray threshold on the result of population estimation, but also takes into account the change of urban population on the two variables of light gross value and light coverage area. Because the ratio of light data index to population data index is used as the basis of estimation, the estimation function parameters of each city are different, which accord with the economic development situation and population distribution characteristics of each city. Through the national sampling data of 1% of the population in 2005, the average relative error of estimation in 21 prefectural cities was 3.69%, and the relative error in the estimation of the total resident population in the whole province was 5.02%. It is proved that the model can effectively estimate the population size of different prefecture-level cities in Guangdong Province. Compared with the existing methods of obtaining demographic data, the model proposed in this paper improves the timeliness of the traditional demographic method, and saves the steps of interpretation and interpretation of ground objects compared with other remote sensing estimation methods, and the estimation error is less than that of other remote sensing estimation methods. The estimation of urban population based on DMSP/OLS data has important application value in studying the size of urban population in China.
【作者單位】: 華南師范大學(xué)地理科學(xué)學(xué)院;
【基金】:國家973計(jì)劃前期研究專項(xiàng)項(xiàng)目(2014CB460614) 國家自然科學(xué)基金項(xiàng)目(41201141)
【分類號】:C921

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