Mapping Nepal: Drones and the Future of Disaster Response

In September 2015, Pix4D participated in a weeklong UAV training mission in Nepal, teaching engineering students at Kathmandu University how to use drones and image-processing software to create professional maps and models for a wide range of humanitarian and development purposes.

Although drones and photogrammetric software for mapping applications are already being used in the fields of surveying and geomatics, solutions are quickly developing for other fields, such as emergency response. In the event of an earthquake like the one that struck Nepal in spring 2015, maps and models produced from drone-acquired imagery and image-processing software can help assist search and rescue operations, damage assessment, reconstruction, preparedness planning and cultural preservation.

Before the training, Kathmandu University (KU) had already been conducting research with drones but lacked the resources and training needed to expand its expertise. Humanitarian UAV Network founder Patrick Meier spearheaded the drone-mapping training in collaboration with KU’s Department of Civil and Geomatics Engineering, Kathmandu Living Labs (KLL), DJI and Pix4D, with the intent of building a community of Nepali UAV operators skilled in imagery analysis.

By spending time with the leading experts in drone technology, students and young professionals learned best practices, guidelines and regulations regarding drone operation. They also received hands-on flight instruction from DJI and software training from Pix4D. Trainees created specialized flight plans using Pix4Dmapper Capture app for image acquisition, then input that data into the image-processing software Pix4Dmapper to create precise 3D models and maps for further analysis.

In an emergency response scenario, these kind of maps and models provide critical information for disaster relief. Satellite imagery has been used in these situations for decades but not without any shortcomings. Availability, spatial resolution and restrictive vertical perspective have limited the usability of satellite-generated datasets. Apart from their low cost, drones combined with image processing software can provide frequent surveys of rapidly changing areas without cloud coverage issues and also offer a much more reliable oblique perspective. All these advantages and the very high resolution output generated by software like Pix4Dmapper have placed UAVs in the spotlight of the disaster response community.

During operational training in the field, participants worked alongside DJI, Pix4D, and the Community Disaster Management Committee (CDMC) of Panga -- a village that had been badly damaged in the earthquake -- to create a complete map of the area. Using Phantom 3 Advanced quadcopters and Pix4Dmapper, orthomosaics were produced overnight and the local community can now use them for the reconstruction process as well as create preparedness plans for future events.  

While this training had a humanitarian base, the goal was to further validate how drones and image analysis can be used in disaster situations. By the end of the workshop, students and professionals had gained firsthand experience with the hardware and software and were able to generate valuable information for the rebuilding process of Panga. Their motivation and collaboration in Nepal will continue to see the applications of drones and image-mapping software as a response to emergencies.


Contact:

Krista Montgomery
krista@pix4d.com
+41 21 552 05 94




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