基于天地图高精度建筑物的四川宝兴县人口估算
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摘要
为了提高震前灾害风险评估和震后灾情快速评估工作中人口空间分布估计的准确性,利用2016年四川宝兴县乡镇人口数据及天地图中的建筑物数据,运用居住建筑人口密度方法得到四川宝兴县各乡镇居住建筑物尺度的人口分布矢量数据,并利用实地调研获取的单体建筑物实际人口进行精度验证。实验结果表明:以居住建筑物体积作为人口空间分布指示因子建模,得到的拟合精度为0.902 7,人口平均相对误差为15.23%,结果具有可靠性,可为震前灾害风险评估和震后灾情快速评估提供更为可靠的数据支撑。
In order to improve the accuracy of pre-earthquake disaster risk assessment and estimate the population spatial distribution in post-earthquake disaster rapid assessment,based on the population data of villages and towns surveyed in Sichuan Baoxing County in 2016 and the building data in Tianditu,we use the method of population density of residential buildings to obtain the vector data of population distribution at the scale of residential buildings in villages and towns of Baoxing County,and verify the accuracy of the actual population of individual building through field investigation. The experimental results show that taking the volume of residential buildings as the indicator of population spatial distribution,the fitting accuracy is 0.902 7,and the average relative error of population is 15.23%,which provides more reliable data support for pre-earthquake disaster risk assessment and post-earthquake disaster rapid assessment.
In order to improve the accuracy of pre-earthquake disaster risk assessment and estimate the population spatial distribution in post-earthquake disaster rapid assessment,based on the population data of villages and towns surveyed in Sichuan Baoxing County in 2016 and the building data in Tianditu,we use the method of population density of residential buildings to obtain the vector data of population distribution at the scale of residential buildings in villages and towns of Baoxing County,and verify the accuracy of the actual population of individual building through field investigation. The experimental results show that taking the volume of residential buildings as the indicator of population spatial distribution,the fitting accuracy is 0.902 7,and the average relative error of population is 15.23%,which provides more reliable data support for pre-earthquake disaster risk assessment and post-earthquake disaster rapid assessment.
引文
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曹彦波,李永强,李敏,等.2014.基于多源数据的云南人口空间分布模拟研究[J].中国地震,30(1):118-131.
杜国明.2008.人口数据空间化方法与实践[M].北京:中国农业出版社.
郭洪旭,黄莹,赵黛青.2013.城市居住人口空间分布的模拟研究——以广州市天河区为例[J].热带地理,33(1):81-87.
郭山山,龚俊,尹晶飞.2016.基于DMSP/OLS的人口分布网格精细化研究[J].地震研究,39(2):321-326.
黄耀欢,杨小唤,刘业森.2007.人口区划及其在人口空间化中的GIS分析应用——以山东省为例[J].地球信息科学学报,9(2):49-54.
江东,杨小唤,王乃斌,等.2002.基于RS、GIS的人口空间分布研究[J].地球科学进展,17(5):734-738.
刘焕金.2012.基于多源数据的太湖流域人口空间化研究[D].南京:南京农业大学.
聂高众,安基文,邓砚.2012.地震应急灾情服务进展[J].地震地质,34(4):782-791.
聂高众,陈建英,李志强,等.2002.地震应急基础数据库建设[J].地震,22(3):105-112.
杨小唤,江东,王乃斌,等.2002.人口数据空间化的处理方法[J].地理学报,57(增刊1):70-75.
杨小唤,刘业森,江东,等.2006.一种改进人口数据空间化的方法:农村居住地重分类[J].地理科学进展,25(3):62-69.
Galeon F A.2008.Estimation of Population in informal settlement communities using high resolution satellite image[J].The International Archives of the Photogrammetry,Remote Sensing and Spatial Information Sciences,137(B4):112-114.
Wu S S,Wang L,Qiu X M.2008.Incorporating GIS Building Data and Census Housing Statistics for Sub-Block-Level Population Estimation[J].Professional Geographer,60(1):121-135.