Computational grid, subgrid, and pixels
Sign Up to like & getrecommendations! Published in 2019 at "International Journal for Numerical Methods in Fluids"
DOI: 10.1002/fld.4715
Abstract: Free‐surface flows in rivers, estuaries, and coastal areas are strongly dominated by the geometrical details of the study area. Nowadays, accurate bathymetric data are easily available on raster‐based digital elevation models with an impressive spatial… read more here.
Keywords: subgrid pixels; resolution; computational grid; grid subgrid ... See more keywords
Comparative assessment of remote sensing–based water dynamic in a dam lake using a combination of Sentinel-2 data and digital elevation model
Sign Up to like & getrecommendations! Published in 2022 at "Environmental Monitoring and Assessment"
DOI: 10.1007/s10661-021-09703-w
Abstract: Monitoring and determining the amount of water in reservoirs is of great importance in terms of water planning and management. This study proposes a geographic information system (GIS)-based methodology to estimate the water volume changes… read more here.
Keywords: dam lake; elevation model; water; model ... See more keywords
Sensitivity analysis of relationships between hydrograph components and landscapes metrics extracted from digital elevation models with different spatial resolutions
Sign Up to like & getrecommendations! Published in 2021 at "Ecological Indicators"
DOI: 10.1016/j.ecolind.2020.107025
Abstract: Abstract Evaluation of sensitivity of hydrograph components and landscape metrics extracted from various spatial resolutions reveals relationships between landscape metrics and outflow properties with the lowest error. In the present study, 14 Digital Elevation Models… read more here.
Keywords: digital elevation; sensitivity; landscape metrics; spatial resolutions ... See more keywords
Influence of digital elevation models on the simulation of rainfall-induced landslides in the hillslopes of Guwahati, India
Sign Up to like & getrecommendations! Published in 2020 at "Engineering Geology"
DOI: 10.1016/j.enggeo.2020.105523
Abstract: Abstract Topographic input parameters such as slope, curvature, and drainage area are derived from a Digital Elevation Model (DEM) representing the spatial elevation, and are widely used as important sources of geospatial information. Based on… read more here.
Keywords: digital elevation; rainfall induced; induced landslides; dem ... See more keywords
Optimizing the Global Digital Elevation Models (GDEMs) and accuracy of derived DEMs from GPS points for Iraq's mountainous areas
Sign Up to like & getrecommendations! Published in 2020 at "Geodesy and Geodynamics"
DOI: 10.1016/j.geog.2020.06.004
Abstract: Abstract Optimizing the combined horizontal and vertical accuracy of the well-known Global Digital Elevation Models (GDEMs) of various resolutions for each country and region especially in Iraq's mountainous areas is still questionable. All the three… read more here.
Keywords: digital elevation; elevation models; accuracy; mountainous areas ... See more keywords
Accuracy assessment of the global TanDEM-X Digital Elevation Model with GPS data
Sign Up to like & getrecommendations! Published in 2018 at "Isprs Journal of Photogrammetry and Remote Sensing"
DOI: 10.1016/j.isprsjprs.2018.02.017
Abstract: Abstract The primary goal of the German TanDEM-X mission is the generation of a highly accurate and global Digital Elevation Model (DEM) with global accuracies of at least 10 m absolute height error (linear 90% error).… read more here.
Keywords: elevation model; error; digital elevation; gps ... See more keywords
Delineating northern peatlands using Sentinel-1 time series and terrain indices from local and regional digital elevation models
Sign Up to like & getrecommendations! Published in 2019 at "Remote Sensing of Environment"
DOI: 10.1016/j.rse.2019.111252
Abstract: Abstract The spatial extent of northern peatlands remains highly uncertain in spite of rapidly developing satellite observation datasets. This is limiting progress in the understanding of fundamental biogeochemical processes, such as the global carbon (C)… read more here.
Keywords: time series; terrain indices; sentinel time; terrain ... See more keywords
Generation of accurate digital elevation models from UAV acquired low percentage overlapping images
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Remote Sensing"
DOI: 10.1080/01431161.2017.1285085
Abstract: ABSTRACT Digital elevation models (DEMs) are very useful in solving various environmental problems such as planning and construction, hydrological and meteorological services, mining and oil industry, risk assessment, and hazard predictions, which makes their accurate… read more here.
Keywords: accurate digital; overlapping images; digital elevation; elevation models ... See more keywords
The impact of horizontal errors on the accuracy of freely available Digital Elevation Models (DEMs)
Sign Up to like & getrecommendations! Published in 2020 at "International Journal of Remote Sensing"
DOI: 10.1080/01431161.2020.1759840
Abstract: ABSTRACT Many freely available global or quasi-global digital elevation model (DEM) datasets, including Advanced Land Observing Satellite (ALOS) World 3 Dimensions (3D) 30 m DEM (AW3D30 DEM), Advanced Spaceborne Thermal Emission and Reflection Radiometer DEM… read more here.
Keywords: digital elevation; horizontal errors; accuracy; dem ... See more keywords
Reducing the grid orientation dependence of flow routing on square-grid digital elevation models
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Geographical Information Science"
DOI: 10.1080/13658816.2017.1358365
Abstract: ABSTRACT Topographical parameters derived from digital elevation models by employing flow routing algorithms may depend on the orientation of the square grid. Grid orientation dependence results from the insufficient isotropy of square grid and affects… read more here.
Keywords: flow routing; orientation; digital elevation; square grid ... See more keywords
A view-tree method to compute viewsheds from digital elevation models
Sign Up to like & getrecommendations! Published in 2022 at "International Journal of Geographical Information Science"
DOI: 10.1080/13658816.2022.2094385
Abstract: Abstract Viewshed computation is a central component for visibility analysis. The majority of existing viewshed computation methods use regular square grid digital elevation models (DEMs) and have limitations in considering spatial relationships among observers, targets… read more here.
Keywords: elevation models; tree method; method; view tree ... See more keywords