Geohazard Monitoring Based on Tilt Photography

doi:10.13474/j.cnki.11-2246.2018.0251

Abstract

Abstract: This paper addresses the needs of pre-disaster warning,disaster assessment,and post-disaster reconstruction and other disaster prevention and rescue work for geological hazards in Guangdong province.Based on the md4-1000 quad-rotor UAV system,this paper explores and studies geological disasters based on oblique photography technology,monitors technical processes and methods and examines the accuracy of their models.Experiments have shown that drones can quickly acquire aerial images with high spatial resolution and multiple angles within a certain range,and based on real-world three-dimensional geohazard warning and monitoring,images captured by drone tilt photography can pass through the airspace.Encryption and absolute orientation establish a real three-dimensional model and real shot images,which can greatly reduce the workload of manual field surveys and improve work efficiency.At the same time,the three-dimensional model of real scenery can be very intuitive to reflect the topographic information of geological hazard hazards.The early warning of disaster hidden points provide a very powerful basis.Through actual measurement data,it is verified that the accuracy of the entire model is better than 0.5 meters,and the plane is better than 0.2 meters.

Key words: tilt photography, geological disaster monitoring, unmanned aerial vehicle, remote sensing

CLC Number:

P237

ZHENG Shifang, LI Zhikun. Geohazard Monitoring Based on Tilt Photography[J]. 测绘通报, 2018, 0(8): 88-92.

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