Aerial surveys cause large but ephemeral decreases in bear presence at salmon streams in Kodiak, Alaska. [PDF]
PLoS ONE, 2019 Aerial surveys are often used to monitor wildlife and fish populations, but rarely are the effects on animal behavior documented. For over 30 years, the Kodiak National Wildlife Refuge has conducted low-altitude aerial surveys to assess Kodiak brown bear
William W Deacy +3 more
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Computing the Deflection of the Vertical for Improving Aerial Surveys: A Comparison between EGM2008 and ITALGEO05 Estimates [PDF]
Sensors, 2016 Recent studies on the influence of the anomalous gravity field in GNSS/INS applications have shown that neglecting the impact of the deflection of vertical in aerial surveys induces horizontal and vertical errors in the measurement of an object that is ...
Riccardo Barzaghi +3 more
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The effect of a multi-target protocol on cetacean detection and abundance estimation in aerial surveys [PDF]
Royal Society Open Science, 2019 A double-platform protocol was implemented in the Bay of Biscay and English Channel during the SCANS-III survey (2016). Two observation platforms using different protocols were operating on board a single aircraft: the reference platform (Scans ...
C. Lambert +10 more
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Peculiarities of geodesic works with the use of UAVs for the needs of land management
Zemleustrìj, Kadastr ì Monìtorìng Zemelʹ, 2021 It is determined and substantiated that the most popular type of survey activity for land management is the use of unmanned aerial vehicles, as most traditional methods of geodetic surveys are not effective enough today, they can not provide the required
E. Butenko, N. Nevoit
doaj +1 more source
MULTI SENSOR AND PLATFORMS SETUPS FOR VARIOUS AIRBORNE APPLICATIONS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 To combine various sensors to get a system for specific use became popular within the last 10 years. Metric mid format cameras meanwhile reach the 100 MPix and entered the mapping market to compete with the big format sensors.
G. Kemper, R. Vasel
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Drones, 2023 The Charleston Estuarine System Stock (CESS) of Tamanend’s bottlenose dolphins (Tursiops erebennus) exhibit long-term site fidelity to the Charleston Harbor, and the Ashley, Cooper, and Wando Rivers in Charleston, South Carolina, USA. In the Cooper River,
Nicole Principe +4 more
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ROCK GLACIER MONITORING USING AERIAL PHOTOGRAPHS: CONVENTIONAL VS. UAV-BASED MAPPING – A COMPARATIVE STUDY [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018 Rock glaciers are creep phenomena of mountain permafrost. Typically, these landforms look like lava flows from a bird’s eye view. Active rock glaciers move downslope with flow velocities in the range of few centimeters to several meters per year.
V. Kaufmann +6 more
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Estimating the abundance of a group‐living species using multi‐latent spatial models
Methods in Ecology and Evolution, 2023 Statistical models use observations of animals to make inferences about the abundance and distribution of species. However, the spatial distribution of animals is a complex function of many factors, including landscape and environmental features, and ...
Colin J. Torney +8 more
doaj +1 more source
Options for aerial surveys of elephants
Pachyderm, 1993 In most areas where elephants occur, aerial surveys are the only means used to establish their numbers. The most common methodology is the systematic reconnaissance flight or the transect sample count, which, however, has been criticised as being ...
G. Craig
doaj +1 more source
Assessing rotation-invariant feature classification for automated wildebeest population counts [PDF]
, 2016 Accurate and on-demand animal population counts are the holy grail for wildlife conservation organizations throughout the world because they enable fast and responsive adaptive management policies.
Borner, Felix +9 more
core +6 more sources