Results 21 to 30 of about 11,296 (261)

Digital elevation model validation with no ground control: application to the topodata dem in Brazil [PDF]

Boletim de Ciências Geodésicas, 2014
Digital Elevation Model (DEM) validation is often carried out by comparing the data with a set of ground control points. However, the quality of a DEM can also be considered in terms of shape realism. Beyond visual analysis, it can be verified that physical and statistical properties of the terrestrial relief are fulfilled.
Polidori, Laurent, El Hage, Mhamad, Valeriano, Marcio De Morisson   +2 more
openaire   +4 more sources

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
openaire   +1 more source

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
doaj   +1 more source

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

Data on comparative studies of lineaments extraction from ASTER DEM, SRTM, and Cartosat for Jilledubanderu River basin, Anantapur district, A.P, India by using remote sensing and GIS

Data in Brief, 2018
The data deals with the functions that automatically extracted lineaments from the Cartosat, ASTER and SRTM of Digital Elevation Model (DEM) of different spatial resolutions, in the software ArcGIS 10.4.
M. Rajasekhar, G. Sudarsana Raju, R. Siddi Raju, M. Ramachandra, B. Pradeep Kumar   +4 more
doaj   +1 more source

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, A. H. M. Din, K. M. Omar, M. F. A. Khanan, A. H. Omar, A. I. A. Hamid, M. F. Pa’suya   +6 more
doaj   +1 more source

Multi-source data joint processing framework for DEM calibration and fusion

International Journal of Applied Earth Observations and Geoinformation
High-accuracy digital elevation models (DEMs) are essential for remote sensing and geospatial analysis, yet integrating multi-source data over large and complex terrains remains challenging.
Cuilin Yu, Qingsong Wang, Zibo Zhang, Zixuan Zhong, Yusheng Ding, Tao Lai, Haifeng Huang, Peng Shen   +7 more
doaj   +1 more source

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
openaire   +3 more sources

Impact of Japan's 2024 Physician Work‐Style Reform on Pediatric Hematology–Oncology: Educational Implications in a 2‐Year Survey

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Japan's 2024 physician work‐style reform introduced legally binding limits on physicians’ working hours, but its impact on education and workforce sustainability in pediatric hematology–oncology (PHO) remains unclear. Procedure We conducted a repeated cross‐sectional study with structured quantitative items and free‐text responses ...
Kiyohiko Kaizu, Masaharu Akiyama, Toshikazu Itabashi, Jun Hayakawa, Takahiro Kikuchi, Ryohei Fukunaga, Katsuyoshi Koh, Takahiro Ueda   +7 more
wiley   +1 more source

Research on the Method of Building Dem by Contours

ITM Web of Conferences, 2017
Digital elevation model (DEM), as an important product of digital photogrammetry and digital surveying and mapping, it plays an increasingly important role in the field of surveying and mapping and geographic information system.
Zhu Ji-Wen, Yang Jin-Ling, Liu Jiang, Liu Dan-Dan, Zhang He   +4 more
doaj   +1 more source