Results 21 to 30 of about 139,178 (334)

Reconstruction and Evaluation of DEMs From Bistatic Tandem-X SAR in Mountainous and Coastal Areas of China

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
TerraSAR-X add-on for Digital Elevation Measurements (TanDEM-X) mission is designed to generate 3-D images of the Earth as the first bistatic synthetic aperture radar (SAR).
Peng Li, Zhenhong Li, Keren Dai, Yasir Al-Husseinawi, Wanpeng Feng, Houjie Wang   +5 more
doaj   +1 more source

InSAR Elevation Inversion Method Based on Backprojection Model with External DEM

Leida xuebao, 2021
When Interferometric Synthetic Aperture Radar (InSAR) is used to obtain the Digital Elevation Model (DEM), highly sloped terrains will make interferometric fringes dense and increase the difficulty of phase unwrapping, which will affect the accuracy of ...
Xiaoning HU, Bingnan WANG, Maosheng XIANG, Zhongbin WANG   +3 more
doaj   +1 more source

Evaluating the Vertical Accuracy of DEM Generated from ZiYuan-3 Stereo Images in Understanding the Tectonic Morphology of the Qianhe Basin, China

Remote Sensing, 2021
Currently available high-resolution digital elevation model (DEM) is not particularly useful to geologists for understanding the long-term changes in fluvial landforms induced by tectonic uplift, although DEMs that are generated from satellite stereo ...
Zhiheng Liu, Ling Han, Zhaohui Yang, Hongye Cao, Fengcheng Guo, Jianhua Guo, Yiqi Ji   +6 more
doaj   +1 more source

MATLAB functions for extracting hypsometry, stream-length gradient index, steepness index, chi gradient of channel and swath profiles from digital elevation model (DEM) and other spatial data for landscape characterisation

, 2020
The landscape, developed by the interaction of geological processes, is represented by Digital Elevation Models (DEMs) of various spatial resolutions.
N. K. Jaiswara, S. K. Kotluri, Prabha Pandey, A. K. Pandey   +3 more
semanticscholar   +1 more source

A Novel Three-Dimensional Block Adjustment Method for Spaceborne InSAR-DEM Based on General Models

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
Digital elevation model (DEM) generated by bistatic synthetic aperture radar interferometry (InSAR) usually has systematic plane and elevation errors. However, the DEM adjustment method based on the function model can only correct systematic elevation ...
Rui Wang, Xiaolei Lv, Li Zhang
doaj   +1 more source

The Importance of Digital Elevation Model Selection in Flood Simulation and a Proposed Method to Reduce DEM Errors: A Case Study in Shanghai

International Journal of Disaster Risk Science, 2021
Digital Elevation Models (DEMs) play a critical role in hydrologic and hydraulic modeling. Flood inundation mapping is highly dependent on the accuracy of DEMs.
Kepeng Xu, Jiayi Fang, Yongqiang Fang, Qinke Sun, Che-Chuan Wu, Min Liu   +5 more
semanticscholar   +1 more source

Comparis of digital elevation model (DEM) and aerial photographs for drainage [PDF]

Modeling Earth Systems and Environment, 2015
Currently, elevation data are available from several major sources and at different spatial resolutions. This paper shows the quality and accuracy of drainage network analysis resulted from ASTER DEMs and aerial photographs. Hydrology toolsets in the when we used the vector datasets for analyzing in separate land features.
Marzieh Mokarram, Majid Hojati
openaire   +1 more source

Spectral filtering as a method of visualising and removing striped artefacts in digital elevation data [PDF]

, 2008
Spectral filtering was compared with traditional mean spatial filters to assess their ability to identify and remove striped artefacts in digital elevation data. The techniques were applied to two datasets: a 100 m contour derived digital elevation model
Albani, Arrell, Arrell, Baltsavias, Bishop, Brocklehurst, Brunson, Champeney, Chen, Christensen, Cooper, Dobrin, Dragut, Felicismo, Fisher, Fisher, Flood, Florinsky, Garbrecht, Guth, Hannah, Hassan, Hengl, Hodgson, Holmes, Hunter, Hutchinson, Jenson, Klinkenberg, Kok, Kumler, Little, Liu, Miliaresis, Moore, Peucker, Pike, Prima, Rayner, Richie, Sithole, Sithole, Su, Temme, Thapa, Walker, Wilson, Wise, Wise, Wise, Wood, Wood   +51 more
core   +1 more source

Ice shelf basal melt rates from a high-resolution digital elevation model (DEM) record for Pine Island Glacier, Antarctica

The Cryosphere, 2019
. Ocean-induced basal melting is responsible for much of the Amundsen Sea Embayment ice loss in recent decades, but the total magnitude and spatiotemporal evolution of this melt is poorly constrained.
D. Shean, I. Joughin, P. Dutrieux, Ben E. Smith, E. Berthier   +4 more
semanticscholar   +1 more source

DEM Void Filling Based on Context Attention Generation Model

ISPRS International Journal of Geo-Information, 2020
The digital elevation model (DEM) generates a digital simulation of ground terrain in a certain range with the usage of 3D point cloud data. It is an important source of spatial modeling information. Due to various reasons, however, the generated DEM has
Chunsen Zhang, Shu Shi, Yingwei Ge, Hengheng Liu, Weihong Cui   +4 more
doaj   +1 more source