UAV-based detection and spatial analyses of periglacial landforms on Demay Point (King George Island, South Shetland Islands, Antarctica)

Dąbski, Maciej; Zmarz, Anna; Pabjanek, Piotr; Korczak−Abshire, Małgorzata; Karsznia, Izabela; Chwedorzewska, Katarzyna J.

doi:10.1016/j.geomorph.2017.03.033

Cited by 53 publications

(42 citation statements)

References 20 publications

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“…Use of unmanned aerial vehicles (UAVs) to collect environmental data is a relatively new phenomenon in Antarctica, but it has already proved to be a very effective tool for ecosystem monitoring purposes (e.g., Turner et al 2012;Watts et al 2012;Funaki et al 2014;Bollard-Breen et al 2015;Dąbski et al 2017;Mustafa et al 2017;Weimerskirch et al 2018). Owing to remote sensing, it is possible to detect environmental changes occurring over large and difficult-toreach areas and whenever the collection of field data is very difficult or impossible.…”

Section: Introductionmentioning

confidence: 99%

Study of fauna population changes on Penguin Island and Turret Point Oasis (King George Island, Antarctica) using an unmanned aerial vehicle

et al. 2018

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An unmanned aerial vehicle (UAV) as an alternative to manned aircrafts is an excellent, less invasive, safe tool, especially in sensitive polar regions. Here we used a fixed-wing UAV to collect data on seabird and pinniped populations in hardly accessible Antarctic areas. The implementation of an auto-piloted UAV equipped with a digital camera (Canon EOS 700D, 35 mm f/2.0 lens) allowed us to collect high-quality material applicable to a quantitative analysis of the fauna populations. A successful photogrammetric mission, at an altitude of 550 m above sea level, was accomplished during one Beyond Visual Line of Sight flight above hard-to-access Penguin Island and Turret Point Oasis (King George Island). Obtained selected RGB images were processed to generate a panoramic image stitch with resolution of 0.07 m ground sampling distance. A total of 4290 (SD = 33.08) breeding individuals of two penguin species, Adélie (Pygoscelis adeliae) and chinstrap (Pygoscelis antarcticus), 426 (SD = 7.78) individuals of the southern elephant seal (Mirounga leonina) and 6 individuals of the Weddell seal (Leptonychotes weddellii) were identified in both study areas. Additionally, 222 (SD = 2.0) individuals of the southern giant petrel (Macronectes giganteus) and 76 (SD = 1.0) of the Antarctic shag (Phalacrocorax atriceps bransfieldensis) in the Turret Point area were recognized. The presented observations on the natural history of the investigated fauna together with the available literature may be useful in future research on population trends. A comparison with available historical data for both investigated areas suggests a decrease of 68.29% in both penguin species in the 1980-2016 period. The presented results confirmed that UAVs are useful for remote census work for Antarctic seabirds.

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Section: Introductionmentioning

confidence: 99%

Study of fauna population changes on Penguin Island and Turret Point Oasis (King George Island, Antarctica) using an unmanned aerial vehicle

et al. 2018

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“…Their use has been constrained, however, by the cost of the images and their spatial and temporal resolution, which often make it impossible to perform detailed analyses. Consequently, unmanned aerial vehicles (UAVs) are becoming valuable mapping and research tools in most branches of geomorphology (Gomez‐Gutierrez et al, ; Immerzeel et al, ; Lucieer et al, ; Prosdocimi et al, ; Cook, ; Dąbski et al, ; Rossini et al, ). In coastal regions UAVs have been used to monitor and map beaches, dunes, cliffs, rocky foreshores, and other coastal elements that often change very rapidly or are in areas that are difficult or dangerous to access (Delacourt et al, ; Gonçalves and Henriques, ; Pérez‐Alberti and Trenhaile, , ; Autret et al, ; Casella et al, ; Ierodiaconou et al, ; Castelle et al, ; Sturdivant et al, ).…”

Section: Introductionmentioning

confidence: 99%

Recording inter‐annual changes on a boulder beach in Galicia, NW Spain using an unmanned aerial vehicle

Gómez‐Pazo

Pérez‐Alberti

Trenhaile

2018

Earth Surf Processes Landf

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An unmanned aerial vehicle (UAV) was flown over a boulder beach (area 20 000 m2) on the southern coast of Galicia (northwestern Spain) in May 2016, continuing earlier work based on flights over the same beach in July 2012, May 2013, and late March 2014. Digital surface models (DSMs) with 1.8 cm resolution were constructed from the 2014 and 2016 data to identify changes in beach morphology over the intervening period. Analyses were conducted using a Limit of Detection (LoD) of 0 cm and 3.71 cm. In both cases, the analyses showed that erosion dominated over 19% of the beach area. Accretion occurred over the rest of the beach, which acquired an additional 1500 m3 of material over the study period. Re‐analysis of the data from earlier flights suggested that erosion dominated on the beach in 2012–2013 and deposition in 2013–2014. Without any clear relationship between beach behaviour and storm severity during each winter period, it is proposed that gravitationally induced erosion and storm‐wave induced deposition are the result of perturbations about an equilibrium beach gradient. The UAV data also suggested that an essentially random component modulates regional patterns of movement. © 2018 John Wiley & Sons, Ltd.

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“…The use of UAV in polar regions, and particularly in Antarctica, is becoming a very important tool for many studies due to the possibility of gathering data on these less accessible regions with unprecedented detail. Although field operations can be easily constrained by weather conditions, the diversity of applications is widening fast, encompassing for instance, glacial retreat quantification [20], landforms mapping [21], vegetation mapping [22] and health state assessment [23], or wildlife inventorying and monitoring [24], just to name some of the most recent ones. In what concerns their use for studying stone circles, it is a topic we have started addressing recently [25] and which, as far as we know, has not been studied before using remote sensing.…”

Section: Introductionmentioning

confidence: 99%

Detection and Delineation of Sorted Stone Circles in Antarctica

et al. 2020

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Sorted stone circles are natural surface patterns formed in periglacial environments. Their relation to permafrost conditions make them very helpful for better understanding the past climates where they were formed and have evolved and also for monitoring current underlying processes in case circles are active. These metric scale patterns that occur in clusters of tens to thousands of circular elements, can be more comprehensively characterized if automated methods are used. This paper addresses their identification and delineation through the development and testing of a set of automated approaches, namely, template matching, sliding band filter, and dynamic programming. All of these methods take advantage of the 3D shape of the structures conveyed by digital elevation models (DEM), built from ultra-high resolution imagery captured by unmanned aerial vehicles (UAV) surveys developed in Barton Peninsula, King George Island, Antarctica (62°S). The best detection results achieve scores above 85%, while the delineations are performed with errors as low as 7%.

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UAV-based detection and spatial analyses of periglacial landforms on Demay Point (King George Island, South Shetland Islands, Antarctica)

Cited by 53 publications

References 20 publications

Study of fauna population changes on Penguin Island and Turret Point Oasis (King George Island, Antarctica) using an unmanned aerial vehicle

Study of fauna population changes on Penguin Island and Turret Point Oasis (King George Island, Antarctica) using an unmanned aerial vehicle

Recording inter‐annual changes on a boulder beach in Galicia, NW Spain using an unmanned aerial vehicle

Detection and Delineation of Sorted Stone Circles in Antarctica

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