基于GDP格网的中国大陆城市DMSP/OLS稳定灯光数据饱和标定方法

被引:13
作者
景欣
晏艺真
晏磊
赵红颖
机构
[1] 北京大学遥感与地理信息系统研究所
[2] 空间信息集成与S工程应用北京市重点实验室
关键词
DMSP/OLS; 稳定灯光; 饱和标定; GDP格网数据;
D O I
暂无
中图分类号
P208 [测绘数据库与信息系统]; P237 [测绘遥感技术];
学科分类号
070503 ; 081603 ; 0818 ; 081802 ; 1404 ;
摘要
DMSP稳定灯光数据产品因其灰度级较低(6bit),通常导致数据在城市中心区域达到饱和,限制了其对城市化进程(如建成区面积)、社会经济发展(如能耗)等关键指标的宏观统计与高精度应用。该文提出一种GDP格网数据辅助去饱和方法,以2010年中国大陆地区DMSP/OLS稳定灯光数据饱和最为严重的36个城市为研究对象,基于该年的GDP格网数据对稳定灯光数据产品进行饱和标定,标定后各城市灯光总和均得到合理提升。为了验证方法的有效性,对标定前后的城市灯光总和与城市建成区面积和能源消耗量两个社会经济指标进行了相关分析,结果表明,标定后的相关系数分别从0.63和0.57提高到0.67和0.61,说明基于GDP格网数据标定方法能够提高稳定灯光数据的应用精度。
引用
收藏
页码:35 / 39
页数:5
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