Results 51 to 60 of about 487 (148)

Simultaneous Generation of Topographic Models and Manning Roughness Coefficient Maps From Tri‐Stereoscopic Satellite Images: Application to the Huarmey River, Peru

The Photogrammetric Record, Volume 41, Issue 195, July‐September 2026.
Tri‐stereoscopic PeruSat‐1 imagery enables the simultaneous generation of 0.70 m‐resolution topography and spatially distributed Manning roughness maps, achieving 0.434 m vertical accuracy. Integrated into HEC‐RAS, these products provide consistent, high‐resolution inputs that improve hydraulic modelling and flood risk assessment in data‐scarce river ...
Jorge L. Miranda‐Pita, Pedro A. Plaza‐Álvarez, Jorge Lopez‐Rebollo, Diego González‐Aguilera   +3 more
wiley   +1 more source

ACCURACY ASSESSMENT OF ALOS WORLD 3D-30M DEMS USING FIELD DATA FROM LAGOS AND FEDERAL CAPITAL TERRITORY, NIGERIA

, 2021
Elevation data set from AW3D30 DEM for two location within Nigeria:Lagos state and ...
Ikenna Arungwa (11587696), Chuks Okolie (10675839)   +1 more
core   +1 more source

Statistical Characteristics of Environments of Precipitating Mesoscale Convective Systems During the Pre‐Summer Season Over South China

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 12, 28 June 2026.
Abstract Mesoscale convective systems (MCSs) are known to induce heavy rainfall and pose significant weather hazards in tropical and mid‐latitude regions. Understanding the environmental conditions of MCSs is essential for improving model simulations and operational precipitation forecasts.
Shiwei Yu, Hui Su, Pak Wai Chan, Naigeng Wu, Cen Wang, Yangzhao Gong   +5 more
wiley   +1 more source

Digital Elevation Models – From Satellite Images to Free Available DEMs [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Digital elevation models are an important component of any Geo-Information System (GIS). This keynote provides an overview of the satellite stereo model orientation and image matching methods currently used to generate Digital Elevation Models (DEMs ...
K. Jacobsen
doaj   +1 more source

The Decline of a Caldera‐Filling Glacier at Volcán Sollipulli, Chile

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 6, June 2026.
Abstract Southern Andean glaciers have undergone fast retreat in recent decades. This results in reduced freshwater storage, contribution to sea‐level rise, and locally to the formation of glacial lakes, that may pose the risk of glacial lake outburst floods (GLOFs).
J. E. Arndt, M. Somos, S. Navas, D. Farías‐Barahona, A. Rivera, H. Xie, A. Fernández   +6 more
wiley   +1 more source

A new digital elevation model over South Africa based on ground and satellite data

, 2022
This study makes contributions toward development of accurate DEM from ground and satellite data over South Africa. This is achieved by preparing recent satellite-based DEMs (AW3D30, SRTM, ASTER, TanDEM-X, and MERIT), assessing their vertical accuracy ...
Mihlali Malindi, Malindi, Mihlali, Odera, Patroba Achola, Patroba Achola Odera   +3 more
core   +1 more source

Analysis of relief morphometry by global DEM in the southern part of the European territory of Russia

Учёные записки Казанского университета: Серия Естественные науки, 2020
The accuracy of four global digital elevation models (GDEMs) was assessed at five key sites in the European part of Russia. Errors observed in the morphometric parameters were analyzed by comparing GDEMs representing the relief of the selected area with ...
I.A. Ashatkin, K.A. Maltsev, G.F. Gainutdinova, B.M. Usmanov, A.M. Gafurov, A.F. Ganieva, T.S. Maltseva, E.R. Gizzatullina   +7 more
doaj   +1 more source

Deep learning-based automated terrain classification using high-resolution DEM data

International Journal of Applied Earth Observations and Geoinformation, 2023
Landforms are a fundamental component of the natural environment, and digital terrain mapping on a large spatial scale is important when studying landforms. In this study, we adopted a semantic segmentation model in computer vision to classify elementary
Jiaqi Yang, Jun Xu, Yunshuo Lv, Chenghu Zhou, Yunqiang Zhu, Weiming Cheng   +5 more
doaj   +1 more source

Decadal Erosion Rates and Sediment Buffering Identified Through Enhanced DEM Differencing Using Underutilized Global Satellite DEMs

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 5, May 2026.
Abstract Quantifying decadal‐scale erosion rates in tectonically active regions is essential for assessing landscape hazards and constraining sediment budgets. A key question in Earth surface processes is how contemporary erosion measurements influenced by recent climatic extremes relate to long‐term geological rates.
Gopal Kumar, Yu‐Chang Chan, Cheng‐Wei Sun, Chih‐Tung Chen   +3 more
wiley   +1 more source

POINTING ANGLE CALIBRATION OF ZY3-02 SATELLITE LASER ALTIMETER USING TERRAIN MATCHING [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
After GLAS (Geo-science Laser Altimeter System) loaded on the ICESat (Ice Cloud and land Elevation Satellite), satellite laser altimeter attracts more and more attention.
G. Li, G. Li, G. Li, X. Tang, X. Tang, X. Tang, X. Gao, X. Gao, X. Gao, J. P. Huang, J. P. Huang, J. Chen, J. Chen, J. Lu, J. Lu   +14 more
doaj   +1 more source