Results 21 to 30 of about 1,578,040 (262)

Daily abundance of Dall’s sheep peaks during late summer in a seasonal habitat of high‐management interest

open access: yesEcosphere, 2022
Informing conservation and management decisions for habitats frequented by species of high management interest often face the challenge of limited resources for conducting wildlife surveys.
Cody E. Deane   +4 more
doaj   +1 more source

Estimation of the populations status and habitat conditions of Anseriformes in the State Nature Reserve «Gydansky» (Russia) using ultralight aviation

open access: yesNature Conservation Research: Заповедная наука, 2018
The Gydan Peninsula is one of the least explored and inaccessible Arctic regions in both the Yamalo-Nenetsky Autonomous Okrug and Russia as a whole. In 2016–2017 we conducted a survey of the Gydansky State Nature Reserve and adjacent areas, counted and ...
Sofia B. Rozenfeld   +6 more
doaj   +1 more source

Photograph: Blue Ridge Aerial Surveys, "Aerial View of Reston," Undated

open access: yes, 2006
Image: Photo, black and white original; 10" x 8" (25.3 cm x 20.3 cm)Undated aerial view of Reston, Virginia taken by Blue Ridge Aerial Surveys. In this image, snow can be seen covering roads and the ground. Most trees do not have leaves.
Blue Ridge Aerial Surveys
core   +1 more source

Use of Unmanned Aerial Vehicles for Traffic Surveys

open access: yesLogi, 2022
The paper deals with the topic of monitoring traffic using unmanned aerial vehicles. The main research goal was to test the possibility of using aerial vehicles for traffic engineering applications, especially for determining the traffic intensity on ...
Kampf Rudolf   +3 more
doaj   +1 more source

Harbour Porpoise Abundance in Portugal over a 5-Year Period and Estimates of Potential Distribution

open access: yesAnimals, 2022
The Iberian porpoise population is small and under potentially unsustainable removal by fisheries bycatch. Recently, a marine Site of Community Importance (SCI) was legally approved in Portugal, but no measures ensued to promote porpoise conservation ...
Andreia Torres-Pereira   +10 more
doaj   +1 more source

Blue Ridge Aerial Surveys, "Aerial View of Reston, Virginia," 1966

open access: yes, 2011
Image: Photo, black and white original; 10" x 8" (25.3 cm x 20.3 cm)Aerial view of Reston, Virginia taken by Blue Ridge Aerial Surveys in 1966. Image shows Lake Anne in the top right corner and early construction of Whiele Avenue from center of image to ...
Blue Ridge Aerial Surveys
core   +1 more source

Narwhal (Monodon monoceros) detection by infrared flukeprints from aerial survey imagery

open access: yesEcosphere, 2021
Visual and observer aerial surveys are important for monitoring wildlife populations but are subject to visibility biases where animals may go undetected.
Katie R. N. Florko   +5 more
doaj   +1 more source

Photograph: Blue Ridge Aerial Surveys, "Aerial View Reston, Virginia," 1966

open access: yes, 2006
Image: Photo, black and white original; 10" x " (25.3 cm x 19.1 cm)Aerial view of Reston, Virginia taken by Blue Ridge Aerial Surveys in 1966. In this image, Lake Anne can be seen in the upper right hand corner. In the bottom left corner, the Dulles Toll
Blue Ridge Aerial Surveys
core   +1 more source

Blue Ridge Aerial Surveys, "Aerial View of Reston, Virginia," undated

open access: yes, 2011
Image: Photo, black and white original; 10" x 8" (25.3 cm x 20.3 cm)Aerial view of Reston, Virginia taken by Blue Ridge Aerial Surveys. Image is undated. In this image, Lake Anne can be identified.
Blue Ridge Aerial Surveys
core   +1 more source

TOWARD AUTOMATIC GEOREFERENCING OF ARCHIVAL AERIAL PHOTOGRAMMETRIC SURVEYS [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Images from archival aerial photogrammetric surveys are a unique and relatively unexplored means to chronicle 3D land-cover changes over the past 100 years.
S. Giordano, A. Le Bris, C. Mallet
doaj   +1 more source

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