Results 11 to 20 of about 499,530 (305)
Hydrology Research, 2022 Abstract Identifying and demarcating watershed areas provides a basis for designing and planning for water resources. In this study, DEMs-based estimates of watershed characteristics of three rivers of Bangladesh – Halda, Sangu, and Chengi – were derived using eight Digital Elevation Models (DEMs) of 30 m, 90 m, and 225 m resolution in ...
Srijon Datta +7 more
openaire +2 more sources
Comparison of different interpolation methods for DEM production [PDF]
International Journal of Advanced Trends in Computer Science and Engineering, 2019 Spatial interpolation, or the estimation of the variables at unobserved locations in geographic space based on the values at observed locations, is fundamental in all geophysical sciences, first of all for the construction of digital elevation model (DEM).
ALCARAS, EMANUELE +2 more
openaire +1 more source
Orthorectification of IKONOS and impact of different resolution DEM [PDF]
Geo-spatial Information Science, 2006 IKONOS image has been wildly used in city planning, precision agriculture and emergence response. However, the accuracy of IKONOS Geo product is limited due to distortion caused by terrain relief. Orthorectification was performed to remove the distortion and the impact of different DEM on orthorectification were evaluated.
Xu Junfeng, Huang Jingfeng
openaire +1 more source
CO-REGISTRATION OF MULTI-TEMPORAL DEM BASED ON SIFT ALGORITHM FOR CHANGE DETECTION OF GLACIERS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017 To detect the change of geographic objects by using multi-temporal DEM, the data must be co-registered firstly. In this paper, the Scale-Invariant Feature Transform (SIFT) algorithm is used to co-register multi-temporal DEM data and glacier change ...
Y. Huang, Q. Hu
doaj +1 more source
Modelling the dynamics of a large rock landslide in the Dolomites (eastern Italian Alps) using multi-temporal DEMs [PDF]
PeerJ, 2018 Latest advances in topographic data acquisition techniques have greatly enhanced the possibility to analyse landscapes in order to understand the processes that shaped them.
Ricarda Gatter +3 more
doaj +2 more sources
A new Greenland digital elevation model derived from ICESat-2 during 2018–2019 [PDF]
Earth System Science Data, 2022 Greenland digital elevation models (DEMs) are indispensable to fieldwork, ice velocity calculations, and mass change estimations. Previous DEMs have provided reasonable estimations for all of Greenland, but the time span of applied source data may lead ...
Y. Fan +8 more
doaj +1 more source
DEM Modeling of Crushable Grain Material under Different Loading Conditions
Periodica Polytechnica Civil Engineering, 2021 This paper deals with the effect of contact conditions on the crushing mechanisms and the strength of granular materials. The computation of crushable grain material under different loading conditions is performed using 3D model of discrete element method (DEM).
M. Amine Benmebarek, Majid Movahedi Rad
openaire +2 more sources
RESEARCH ON A DEM COREGISTRATION METHOD BASED ON THE SAR IMAGING GEOMETRY [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018 Due to the systematic error, especially the horizontal deviation that exists in the multi-source, multi-temporal DEMs (Digital Elevation Models), a method for high precision coregistration is needed.
Y. Niu +8 more
doaj +1 more source
Use of HAND terrain descriptor for estimating flood-prone areas in river basins
Revista Brasileira de Ciências Ambientais, 2021 The flood hazard mapping in a river basin is crucial for flooding risk management, mitigation strategies, and flood forecasting and warning systems, among other benefits.
Ana Alice Rodrigues Dantas +1 more
doaj +1 more source
Suitability of ground-based SfM-MVS for monitoring glacial and periglacial processes [PDF]
, 2016 Photo-based surface reconstruction is rapidly emerging as an alternative survey technique to lidar (light detection and ranging) in many fields of geoscience fostered by the recent development of computer vision algorithms such as structure from motion ...
Carturan, Luca +6 more
core +2 more sources