Results 31 to 40 of about 20,734 (307)
On the uncertainty of stream networks derived from elevation data: the error propagation approach [PDF]
, 2010 DEM error propagation methodology is extended to the derivation of vector-based objects (stream networks) using geostatistical simulations. First, point sampled elevations are used to fit a variogram model.
Heuvelink, G.B.M. +3 more
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Evaluation of vertical accuracy of open source Digital Elevation Model (DEM)
International Journal of Applied Earth Observation and Geoinformation, 2013 Abstract Digital Elevation Model (DEM) is a quantitative representation of terrain and is important for Earth science and hydrological applications. DEM can be generated using photogrammetry, interferometry, ground and laser surveying and other techniques.
Sandip Mukherjee +5 more
openaire +1 more source
Model zemeljskega površja - DMR ali DMV? : Earth's Digital Surface Model - DTM or DEM? [PDF]
Geodetski Vestnik, 2002 Definition of a term digital terrain model that can be shortly described as 'digital description of the Earth's surface' was analysed. Meaning and usage of terms 'digital terrain model' or shortly DTM and 'digital elevation model' or DEM were cleared up.
Tomaž Podobnikar
doaj
An investigation of Digital Elevation Model (DEM) structure influence on flood modelling
IOP Conference Series: Earth and Environmental Science, 2018 Flood is one of the natural calamities that cause huge losses and damages. Flood hazard zonation has been widely produced to face the impact of the disaster. DEM as the primary data to construct the earth surface has been developed from rough to fine resolution. Aster GDEM v.2 within 1arc spatial resolution has an ability to derived DEM and TIN data as
null Sahid, A W Nurrohman, M P Hadi
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Comments on “An Adaptive Terrain-Dependent Method for SRTM DEM Correction Over Mountainous Areas”
IEEE Access, 2021 This paper comments on an article published in IEEE Access (C. Zhou et al., “An Adaptive Terrain-Dependent Method for SRTM DEM Correction Over Mountainous Areas,” IEEE Access, Vol. 8, pp. 130878–130887, 2020, DOI: 10.1109/ACCESS.2020.
Kazimierz Becek
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DETERMINATION OF A TOPOGRAPHIC WETNESS INDEX USING HIGH RESOLUTION DIGITAL ELEVATION MODELS
European Journal of Geography, 2023 Topographic wetness indices (TWIs) computed from digital elevation models (DEMs) are means to forecast the amount of moisture in the soil. In this study, using sub-pixel/pixel attraction the spatial resolution of digital elevation models (DEM) was ...
Majid HOJATI, Marzieh MOKARRAM
doaj +2 more sources
Modelling the spatial distribution of DEM Error
, 2005 Assessment of a DEM’s quality is usually undertaken by deriving a measure of DEM accuracy – how close the DEM’s elevation values are to the true elevation.
Carlisle, Bruce
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SENSITIVITY ANALYSIS OF UAV-PHOTOGRAMMETRY FOR CREATING DIGITAL ELEVATION MODELS (DEM) [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012 Abstract. This study evaluates the potential that lies in the photogrammetric processing of aerial images captured by unmanned aerial vehicles. UAV-Systems have gained increasing attraction during the last years. Miniaturization of electronic components often results in a reduction of quality.
G. Rock, J. B. Ries, T. Udelhoven
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OPEN-SOURCE DIGITAL ELEVATION MODEL (DEMs) EVALUATION WITH GPS AND LiDAR DATA [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 Advanced Spaceborne Thermal Emission and Reflection Radiometer-Global Digital Elevation Model (ASTER GDEM), Shuttle Radar Topography Mission (SRTM), and Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010) are freely available Digital ...
N. F. Khalid +6 more
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GIS and Digital Elevation Model (DEM) Data
, 2022 High resolution digital elevation model (DEM) data can now be found online for many areas of the world. GIS software and Python can be used to visualize elevation data in both 2D and 3D, and to analyze digital elevation models in a variety of different ...
Shensky, Michael
core +1 more source