Results 1 to 10 of about 139,178 (334)

European Digital Elevation Model Validation against Extensive Global Navigation Satellite Systems Data and Comparison with SRTM DEM and ASTER GDEM in Central Macedonia (Greece)

ISPRS International Journal of Geo-Information, 2019
Digital elevation models (DEMs) are a widely used form of topographic information, with some of the most popular being the Shuttle Radar Topography Mission (SRTM) DEM and the Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital ...
Antonios Mouratidis, Dimitrios Ampatzidis   +1 more
doaj   +4 more sources

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, P.K. Joshi, Samadrita Mukherjee, Aniruddha Ghosh, R.D. Garg, Anirban Mukhopadhyay   +5 more
semanticscholar   +4 more sources

A systematic review and meta-analysis of Digital Elevation Model (DEM) fusion: pre-processing, methods and applications [PDF]

ISPRS Journal of Photogrammetry and Remote Sensing, 2022
The remote sensing community has identified data fusion as one of the key challenging topics of the 21st century. The subject of image fusion in two-dimensional (2D) space has been covered in several published reviews.
C. Okolie, J. Smit
semanticscholar   +3 more sources

The New Landsat Collection-2 Digital Elevation Model

Remote Sensing, 2020
The Landsat Collection-2 distribution introduces a new global Digital Elevation Model (DEM) for scene orthorectification. The new global DEM is a composite of the latest and most accurate freely available DEM sources and will include reprocessed Shuttle ...
Shannon Franks, James Storey, Rajagopalan Rengarajan   +2 more
doaj   +2 more sources

Ownership Protection on Digital Elevation Model (DEM) Using Transform-Based Watermarking

ISPRS International Journal of Geo-Information, 2022
This research aims to protect Digital Elevation Model (DEM) data from piracy or counterfeiting. An invisible watermark inserted into the data, which will not considerably change the data value, is necessary.
Fahmi Amhar, Endang Purnama Giri, Florence Elfriede Sinthauli Silalahi, Shelvie Nidya Neyman, Anggrahito, Dadan Ramdani, Danang Jaya, Dewayany Sutrisno, Sandi Adhitya Kolopaking, Tia Rizka Nuzula Rachma, Murdaningsih   +10 more
doaj   +2 more sources

Assessment of Digital Elevation Model (DEM) aggregation methods for hydrological modeling: Lake Chad basin, Africa

Computers & Geosciences, 2009
Digital Elevation Models (DEMs) are used to compute the hydro-geomorphological variables required by distributed hydrological models. However, the resolution of the most precise DEMs is too fine to run these models over regional watersheds. DEMs therefore need to be aggregated to coarser resolutions, affecting both the representation of the land ...
Le Coz, Mathieu, Delclaux, François, Genthon, Pierre, Favreau, Guillaume   +3 more
openaire   +3 more sources

A Seamless, High-Resolution, Coastal Digital Elevation Model (DEM) for Southern California [PDF]

Data Series, 2010
A seamless, three-meter digital elevation model (DEM) was constructed for the entire Southern California coastal zone, extending 473 km from Point Conception to the Mexican border. The goal was to integrate the most recent, high-resolution datasets available (for example, Light Detection and Ranging (Lidar) topography, multibeam and single beam sonar ...
Patrick L. Barnard, Daniel Hoover
openaire   +2 more sources

Cost-Efficient Digital Elevation Model (DEM) Acquisition on Flume Tank Morphodynamic Observation

JGEET: Journal of Geoscience, Engineering, Environment and Technology
Digital Elevation Model (DEM) is well known for providing solutions to the theoretical and application-related problems around geosciences. The use of DEM in flume tank experiment is getting more common nowadays.
Octria Adi Prasojo, Adlirrahman Aufar, Reza Syahputra   +2 more
doaj   +2 more sources

Evaluation of the Efficiency of SfM-Photogrammetry in Obtaining DEM from Google Earth Images [PDF]

JES: Journal of Engineering Sciences, 2023
In this study, we seek to evaluate the efficiency of SfM Photogrammetry in obtaining Digital Elevation Model (DEM) from the free Google Earth browser, by simulating the aerial photography of the terrain displayed by this browser, calculating the ...
Ahmed A Elashiry, Omar Al Khalil
doaj   +1 more source

Vertical accuracy comparison of multi-source Digital Elevation Model (DEM) with Airborne Light Detection and Ranging (LiDAR)

IOP Conference Series: Earth and Environment, 2022
Digital Elevation Model (DEM) is a digital representation of ground surface topography or terrain. There are many freely available DEM data with a spatial resolution of 30 m to 90 m.
L. Chai, C. Wong, D. James, H. Y. Loh, J. S. J. Liew, W. Wong, M. Phua   +6 more
semanticscholar   +1 more source