Results 51 to 60 of about 2,991,442 (236)

Topography constrains the climatic response of treeline migration in Taiwan's subalpine forests

Ecography, EarlyView.
Treelines are moving upslope, but the rates and drivers differ among different regions, globally. Many studies have examined the relationship between treeline movement and climate change, particularly rising temperature, while the role of topographical factors has received much less attention, despite the longstanding recognition of its importance.
Kuan‐Yu Chen, Jonathan Peereman, J. Aaron Hogan, Teng‐Chiu Lin   +3 more
wiley   +1 more source

Creation of a Landslide Susceptibility Map Using Short‐Term Data From the July 2018 Heavy Rainfall in Southern Hiroshima Prefecture

Geological Journal, EarlyView.
This work advances landslide susceptibility mapping by incorporating short‐term trigger data with landscape susceptibility mapping. We also examine the importance of downsampling, watershed delineation and geospatial correlations in evaluating outcomes.
Kanta Kotsugi, Ting Liu, Toshiro Hata, Rebecca Muenich   +3 more
wiley   +1 more source

Capability of low cost digital camera for production of orthophoto and volume determination [PDF]

, 2011
This paper discusses about the use of low cost digital camera or known as non metric camera as photogrammetry tool for speeding up the process of acquiring aerial data. Digital camera can also be categorized as non metric camera.
Tahar, K. N., Ahmad, Anuar, Anuar Ahmad, null Khairul Nizam Tahar   +3 more
core   +1 more source

Orthophoto and DSM Rutor Glacier

, 2023
Orthophoto and Digital Surface Model (DSM) obtained from the photogrammetric flight over Rutor Glacier in September 2021. Ground Sample Distance (GSD) = 0.5 mThe presented dataset is the result of the multidisciplinary work of the cc-glacier-lab of the ...
Tamea, Stefania, Ajmar, Andrea, Camporeale, Carlo, Godio, Alberto, Vergnano, Andrea, Giulio Tonolo, Fabio, Corte, Elisabetta, Cina, Alberto, Coviello, Velio, Macelloni, Myrta Maria   +9 more
core   +1 more source

Meander‐Bend Erosion Dynamics Along a Gravel‐Bed River: Insights From Short‐Term UAV Monitoring

River Research and Applications, EarlyView.
ABSTRACT Riverbank erosion is a natural process in meandering rivers that contributes to sediment supply and geomorphic diversity, yet it can threaten infrastructure and human activities within the floodplain. Recently, many studies have used high‐resolution remote sensing technologies to measure bank erosion, but they often focus on technical aspects ...
Katarina Pavlek, Mateo Gašparović, Tomáš Galia   +2 more
wiley   +1 more source

Digital photogrammetry: comparison of digital orthophoto based on different dataset of digital images of aerial photograph [PDF]

, 2008
Data is an essential component in Geographic Information System (GIS), where it represents 70% of GIS. There are many techniques to acquire GIS data such as field work, photogrammetry, remote sensing, Global Positioning System (GPS) and source from ...
Ahmad, Anuar, Adnan, Nur Azhani
core  

Orthophoto production and accuracy analysis with UAV photogrammetry

, 2022
Undoubtedly, Unmanned Aerial Vehicles (UAVs) are one of today’s most functional technology products. In recent years, UAVs integrated with different sensors and transformed into harmony with advanced technology are developing rapidly and used in various ...
Güngör R., Atak B., Uzar M., Gümüş E., Yılmaz O.S.   +4 more
core   +1 more source

High-resolution orthophoto map and digital surface models of the largest Argentine Islands (the Antarctic) from unmanned aerial vehicle photogrammetry

, 2020
This study presents the first high-resolution orthophoto maps and digital surface models (DSMs) of the largest Argentine Islands, West Antarctica. Aerial surveys with small unmanned aerial vehicle (UAV) were performed in Austral summer, 2018, taking 10 ...
K. Lamsters, J. Karušs, M. Krievāns, J. Ješkins   +3 more
semanticscholar   +1 more source

Improving forest age estimation to understand subtropical forest regrowth dynamics using deep learning image segmentation of time‐series historical aerial photographs

Remote Sensing in Ecology and Conservation, EarlyView.
Accurately estimating forest age is key to understanding how forests recover and evaluating restoration success. We developed a two‐step deep learning approach using historical greyscale aerial photographs to map forest age at fine spatial scales. By combining a pre‐trained model with localized fine‐tuning, our U‐Net + ResNet50 architecture achieved ...
Ying Ki Law, Yi‐Fei Gu, Shuwen Liu, Guangqin Song, Aland H. Y. Chan, Cham Man Tse, Zhonghua Liu, Martha J. Ledger, Billy C. H. Hau, Sawaid Abbas, Jin Wu   +10 more
wiley   +1 more source

Towards periodic and time-referenced flood risk assessment using airborne remote sensing

Journal of Hydrology and Hydromechanics, 2016
Flood risk management is founded on the regular assessment of damage potential. A significant parameter for assessing damage potential is the number of at-risk objects.
Brenner Claire, Meisch Claude, Apperl Benjamin, Schulz Karsten   +3 more
doaj   +1 more source