Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-3/W3, 379-384, 2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
19 Aug 2015
J. Linchant1, S. Lhoest1, S. Quevauvillers1, J. Semeki2, P. Lejeune1, and C. Vermeulen1 1Dept. BIOSE, Gembloux Agro-Bio Tech, University of Liège, 2 Passage des Déportés, 5030 Gembloux, Belgium
2Département des Eaux et Forêts, Faculté de Gestion des Ressources Naturelles Renouvelables, Université de Kisangani, BP 2012, Kisangani, Democratic Republic of Congo
Keywords: UAS, drone, wildlife inventory, detection, data processing, sampling area, flight plan Abstract. To get around UAS limitations and propose a viable solution for wildlife monitoring, the development of new inventory methods is needed. However, most authors use the classic systematic transect method as data processing and statistics are easier. We thus created an application to process data from every type of flight plan and to help detect and compare observations on large datasets. WiMUAS is a small software compatible with the open-source QGIS© that allows the creation of visual maps compatible with geographical information systems based on telemetry data and payload parameters to estimate the covered area. The application also has a slider for animal detection that allows multiple observers to record and compare their results for accurate counts. We then tested it on data from a trial realized on savannah animal populations in Democratic Republic of Congo using the Falcon UAS. We created a new type of flight plan, a rosette-shaped design that can be covered in three flights,.and repeated it twice. More than 5000 images were collected during the six flights. Image projection gives an area of 12,4 km2 for the first trial and of 12,1 km2 for the second. The mean sampling rate for both test is 6,1 %. Observers spotted buffaloes, hippos, warthogs and various antelopes with different success over an average rate of 8 images reviewed per minute. Resulting densities observed by the three observers are similar for each test (coefficient of variation 6,9 and 8,6 % respectively) but mean densities vary a lot between the two trials (23,8 and 6,5 animals/km2 respectively).
Conference paper (PDF, 14860 KB)

Citation: Linchant, J., Lhoest, S., Quevauvillers, S., Semeki, J., Lejeune, P., and Vermeulen, C.: WIMUAS: DEVELOPING A TOOL TO REVIEW WILDLIFE DATA FROM VARIOUS UAS FLIGHT PLANS, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-3/W3, 379-384,, 2015.

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