Results 21 to 30 of about 4,751,685 (276)

REPORT ON THE MAP OF WEST ONGUL ISLAND

Antarctic Record, 1965
0ne sheet map of West Ongul Island, separated by a narrow strait from East Ongul Island in which Syowa Station is situated, was compiled with 1 : 5,000 scale.
Arao YOSHIDA, Yoshio SAITO
doaj   +1 more source

How Much Can We See from a UAV-Mounted Regular Camera? Remote Sensing-Based Estimation of Forest Attributes in South American Native Forests

Remote Sensing, 2021
Data collection from large areas of native forests poses a challenge. The present study aims at assessing the use of UAV for forest inventory on native forests in Southern Chile, and seeks to retrieve both stand and tree level attributes from forest ...
Alejandro Miranda, Germán Catalán, Adison Altamirano, Carlos Zamorano-Elgueta, Manuel Cavieres, Javier Guerra, Blas Mola-Yudego   +6 more
doaj   +1 more source

Using Aerial Photogrammetry to Assess Stock-Wide Marine Turtle Nesting Distribution, Abundance and Cumulative Exposure to Industrial Activity

Remote Sensing, 2021
The lack of accurate distribution maps and reliable abundance estimates for marine species can limit the ability of managers to design scale-appropriate management measures for a stock or population.
Sabrina Fossette, Graham Loewenthal, Lauren R. Peel, Anna Vitenbergs, Melanie A. Hamel, Corrine Douglas, Anton D. Tucker, Florian Mayer, Scott D. Whiting   +8 more
doaj   +1 more source

Urban Forest Growth and Gap Dynamics Detected by Yearly Repeated Airborne Light Detection and Ranging (LiDAR): A Case Study of Cheonan, South Korea

Remote Sensing, 2019
Understanding forest dynamics is important for assessing the health of urban forests, which experience various disturbances, both natural (e.g., treefall events) and artificial (e.g., making space for agricultural fields).
Heejoon Choi, Youngkeun Song, Youngwoon Jang   +2 more
doaj   +1 more source

Summer Abundance of Harbour Porpoises (Phocoena phocoena) in the Coastal Waters of Iceland and the Faroe Islands

NAMMCO Scientific Publications, 2020
This study presents the first fully corrected abundance estimates for the harbour porpoise (Phocoena phocoena) for Iceland and the Faroe Islands. In both regions reliable estimates are needed to assess the impact of by-catch and other threats to harbour ...
Anita Gilles, Thorvaldur Gunnlaugsson, Bjarni Mikkelsen, Daniel G. Pike, Gísli A. Víkingsson   +4 more
doaj   +1 more source

Aerial Drone Survey

International Journal of Advanced Research in Science, Communication and Technology, 2022
The use of unmanned aerial vehicles (UAVs) is growing rapidly across many civil application domains including real-time monitoring, providing wireless coverage, remote sensing, search and rescue, delivery of goods, security and surveillance, precision agriculture, and civil infrastructure inspection.
null Reshma K R, null Asif Shameer, null Dharsan K   +2 more
openaire   +1 more source

An automatic spectral stabilization based on adaptive derivative Gaussian peaking algorithm

He jishu
BackgroundAviation γ spectrometer, measuring at high-altitude with low background counting rate, is prone to spectral line drift caused by factors such as long stable spectral periods and significant temperature effects due to its low background counting
WU Leichao, LI Jiangkun, ZHANG Guangya, WU Xue, LI Yizhou   +4 more
doaj   +1 more source

Selous aerial survey 1981

Pachyderm, 1983
Summarizes results from the 1981 Selous aerial survey, which included about 35% of the Reserve, and compares them to the 1976 data. Elephant numbers seem to have remained relatively stable with the 1976 estimate being 82,628 +/- 17% and the 1981 one ...
Markus Borner
doaj   +1 more source

L’avancée récente de l’étude des réseaux routiers anciens de la région Bretagne (1995-2020)

Archéopages, 2022
Ten years ago, the SRA of Brittany launched an inventory of the main road network of Brittany’s peninsula, in order to record remains and routes reconstructed in Patriarch as archaeological entities.
Gilles Leroux, Thierry Lorho
doaj   +1 more source

Study on wavelet denoising effect of transient electromagnetic method based on optimal threshold reference

Meikuang Anquan
The field data acquisition of transient electromagnetic method is prone to jump due to various random disturbances. Wavelet denoising realizes data denoising by multi-scale decomposition, threshold setting and reconstruction of signal.
Yi DONG, Chuang YANG
doaj   +1 more source