Planar Block Adjustment for China’s Land Regions with LuoJia1-01 Nighttime Light Imagery

Remote Sensing

Yuan Zhao¹  Peng Jia²  Zhuxi Zhang³  Boyang Jiang⁴  Xin Li⁴  Taoyang Wang⁴  Guo Zhang⁵ 

[1] China Academy of Space Technology, Beijing 100094, China;China Satellite Navigation Office, Beijing 100034, China;National Transportation Preparation Office, Beijing 100036, China;School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, China;State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China;

关键词: Luojia1-01;    nighttime light imagery;    planar block adjustment;    ground control points;    accuracy;   

DOI  :  10.3390/rs11182097

来源: DOAJ

【 摘 要 】

The Luojia1-01 satellite provides high-resolution, high-sensitivity nighttime light data at a resolution of 130 m. To effectively use the Luojia1-01 nighttime light data for global applications, the problems of relative and absolute positioning accuracy should be solved. This paper proposes a high accuracy regional geometric processing method of nighttime light imagery. We utilized a nighttime light image matching algorithm to obtain tie points, which are used in the planar block adjustment with ground control points. Then, orthorectification of all images is implemented. Finally, we obtain the nighttime light map of China by mosaicking all the nighttime light orthoimages. According to the experimental results for 275 Luojia1-01 images, the root mean square error of the tie points is 0.983 pixels and the root mean square error of independent checkpoints is 195.491 m (less than 1.5 pixels) after the planar block adjustment. The experimental results prove the validity and feasibility of the proposed method.

【 授权许可】

Unknown