| Title | Testing the potential of UAV photogrammetry for deriving bare earth models in Arctic shrublands |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Fraser, R H ;
Lantz, T C; McFarlane-Winchester, M; van der Sluijs, J; Prévost, C |
| Source | Geomatics Canada, Open File 54, 2020, 20 pages, https://doi.org/10.4095/321447  Open Access |
| Image |  |
| Year | 2020 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf |
| Province | Northwest Territories |
| NTS | 107C/01; 107C/02; 107C/07; 107C/08 |
| Area | Mackenzie Delta; Tuktoyaktuk Peninsula; Inuvik-Tuktoyaktuk Highway; Tuktoyaktuk |
| Lat/Long WENS | -133.5000 -132.9167 69.5000 69.0000 |
| Subjects | geophysics; Nature and Environment; Science and Technology; remote sensing; photogrammetric techniques; photogrammetric surveys; photography; digital terrain modelling; vegetation; sediments; glacial
deposits; tills; till plains; permafrost; ground ice; wetlands; topography; software; Tuktoyaktuk Coastal Plain Ecoregion; Methodology; drones; unmanned aerial vehicles; Climate change; elevations |
| Illustrations | location maps; photographs; aerial photographs; models; tables; plots; histograms |
| Program | Remote Sensing Science |
| Released | 2020 01 07 |
| Abstract | (Summary)
We conducted an experiment to test the potential of UAV-based surveying and photogrammetry to delineate a 'bare earth' surface or digital terrain model (DTM) in dense Arctic
shrublands. High overlap (86%/80%) UAV photo surveys captured at two resolutions (5.5 mm and 22 mm) were processed into dense point clouds using a conventional structure from motion workflow. DTMs were derived from the point clouds by triangulating
the lowest points within 1 meter windows and resampling to a 1 cm raster grid. Mean absolute vertical error of the DTM, assessed using 90 ground elevations surveyed in the field, was 5.4 cm for the 5.5 mm survey and 8.3 cm for the 22 mm survey.
Larger errors for the coarser 22 mm survey were due to poorer point cloud modeling of ground surface features within the gaps of denser shrub canopy. |
| Summary | (Plain Language Summary, not published)
We conducted an experiment to test the potential of UAV-based surveying and photogrammetry to delineate a 'bare earth' surface or digital terrain model
(DTM) in dense Arctic shrublands. High overlap UAV photo surveys captured at two resolutions were processed into dense point clouds using a conventional structure from motion workflow. Mean absolute vertical error of the DTM, assessed using 90 ground
elevations surveyed in the field, was 5.4 cm for the 5.5 mm survey and 8.3 cm for the 22 mm survey. Our results suggest that ground elevations can be modelled with high accuracy in dense, low-Arctic shrublands using high-resolution, high-overlap UAV
photo surveys and SfM processing. |
| GEOSCAN ID | 321447 |
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