Title :
Effects of point density on DEM accuracy of airborne LiDAR
Author :
Jia Yafei ; Lan Tian ; Peng Tao ; Wu Hongbo ; Li Cuiling ; Ni Guoqiang
Author_Institution :
Sch. of Optoelectron., Beijing Inst. of Technol., Beijing, China
Abstract :
At the request for quick measurement of airborne lidar, the high-density data collected from selected areas was reduced to different percentage of its original density. And the digital elevation models (DEMs) was generated from the ground points extracting from varying point density data sets. Then the correlation between DEMs generated from lower resolution ground data and those from original ground data were analyzed and compared. It is found that point density data set of at least 0.6 points per square meter is necessary to generate an accurate digital elevation model for the test of the measured urban environment. The conclusion is important for quick data acquirement and quick scanning of disaster area after the occurrence of natural disasters.
Keywords :
airborne radar; data analysis; digital elevation models; disasters; geophysical techniques; optical radar; radar resolution; DEM accuracy; airborne LiDAR; digital elevation model; ground data analysis; high-density data collection; natural disaster; point density data set extraction; Atmospheric modeling; Irrigation; Software; Airborne LIDAR; DEM; accuracy of digital elevation models; point density;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2013 IEEE International
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4799-1114-1
DOI :
10.1109/IGARSS.2013.6721200
