Zidu Ouyang, Cui Zhou, Jian Xie, Jianjun Zhu, Gui Zhang, Minsi Ao,
The Shuttle Radar Topographic Mission (SRTM) digital elevation model (DEM) is a widely utilized product for geological, climatic, oceanic, and ecological applications. However, the accuracy of the SRTM DEM is constrained by topography and vegetation. Using machine learning models to correct SRTM DEM with high-accuracy reference elevation observations has ... underfitting and limit improvements in the accuracy of SRTM DEM products. In this study, we presented an algorithm for correcting SRTM DEM using a stacking ensemble machine learning algorithm. ...
Tópico(s): Synthetic Aperture Radar (SAR) Applications and Techniques
2023 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Yi Li, Haiqiang Fu, Jianjun Zhu, Ke‐Fu Wu, Pan-feng Yang, Li Wang, Shijuan Gao,
... decade has witnessed the rapid development of the SRTM (Shuttle Radar Topography Mission) DEM (digital elevation model) ... engineering applications and scientific research. The near-global SRTM DEM was generated based on radar interference theory. The latest version of the SRTM DEM with a resolution of 1 arc-second ... have shown the poor elevation accuracy of the SRTM DEM in forested areas. Recent developments in the ... chance to correct the elevation error of the SRTM DEM in forested areas. We developed an easy- ...
Tópico(s): Cryospheric studies and observations
2022 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Kateřina Gdulová, Jana Marešová, Vojtěch Barták, Marta Szostak, Jaroslav Červenka, Vítězslav Moudrý,
... vegetation changes. The combination of models (e.g., SRTM and TanDEM-X) can contain errors, which can, ... the aforementioned global DEMs. In addition, we subtracted SRTM and TanDEM-X data at 90 and 30 ... Giant Mountains. We found that vertical bias of SRTM and TanDEM-X, relative to the canopy height, ... forest areas. In forests, the vertical bias of SRTM and TanDEM-X ranged from −0.5 to ... 11.0 m, respectively. The height differences between SRTM and TanDEM-X show moderate dependence on the slope and its orientation. LE90s for TDX-SRTM differences tended to be smaller for east-facing ...
Tópico(s): Forest Management and Policy
2021 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Produção Nacional
Revisado por pares
Frédéric Satgé, Matheus Denezine, Ramiro Pillco Zolá, F. Timouk, Sébastien Pinel, Jorge Molina‐Carpio, Jérémie Garnier, F. Seyler, Marie‐Paule Bonnet,
... the 1 arc-second mesh size (spatial resolution) SRTM-GL1 (Shuttle Radar Topographic Mission – Global 1) product ... DEM) provides valuable topographic information over remote regions. SRTM-GL1 is assessed for the first time over ... scale and for different slope classes. For comparison, SRTM-v4 and GDEM-v2 Global DEM version 2 ( ... is proposed to assess the relative accuracies of SRTM-GL1, SRTM-v4 and GDEM-v2 based on a comparison ... GDEM-v2 is the most accurate DEM, while SRTM-GL1 is more accurate than SRTM-v4. However, ...
Tópico(s): Landslides and related hazards
2016 - Elsevier BV | ISPRS Journal of Photogrammetry and Remote Sensing
Kishan Singh Rawat, Anil Kumar Mishra, Vinay Kumar Sehgal, Nayan Ahmed, Vinod Kumar Tripathi,
... model (DEM) data of Shuttle Radar Topography Mission (SRTM) are distributed at a horizontal resolution of 90 ... 2.6 m horizontal resolution for global coverage. SRTM and ASTER data are available freely but 2. ... accuracy for selected ground control points (GCPs) from SRTM and ASTER with respect to CARTOSAT-1 DEM ... CARTOSAT-1 DEM can be evaluated. The original SRTM image contained voids that were represented digitally as − ... for obtaining accurate DEM. Horizontal accuracy analysis between SRTM- and ASTER-derived DEMs with respect to CARTOSAT- ...
Tópico(s): Cryospheric studies and observations
2012 - Taylor & Francis | Geocarto International
Weicai Wang, Xiaoxin Yang, Tandong Yao,
... GDEM) and the Shuttle Radar Topography Mission data (SRTM) for hydraulic modelling. This study explores the suitability ... evaluate the elevation accuracy of ASTER GDEM and SRTM, and their suitability for hydraulic modelling of GLOFs. The elevation accuracies of ASTER GDEM and SRTM were first validated against field global position system ( ... aerial photography. Moreover, the DEM5, ASTER GDEM and SRTM were used as basic topographic data to simulate ... to evaluate the suitability of ASTER GDEM and SRTM for GLOF hydraulic modelling. Comparisons of ASTER GDEM ...
Tópico(s): Hydrology and Watershed Management Studies
2011 - Wiley | Hydrological Processes
Ashton Shortridge, Joseph P. Messina,
... the spatial structure of Shuttle Radar Topography Mission (SRTM) error and its associations with globally available topographic ... a wide range of landscapes. Two continental-scale SRTM elevation data samples were extracted, along with collocated ... and the 3 arc sec (3″) horizontal resolution SRTM product. Slope and aspect were calculated for all ... the larger point sample, we identified associations between SRTM error, defined as NED–SRTM 3″ differences, with these land cover and terrain ... more comprehensive evaluation of the spatial structure of SRTM error than has previously been done. The punctual ...
Tópico(s): Cryospheric studies and observations
2011 - Elsevier BV | Remote Sensing of Environment
C. C. Carabajal, David J. Harding,
... those produced by the Shuttle Radar Topography Mission (SRTM). We document elevation differences between SRTM C-band 1 and 3 arcsecond resolution DEMs ... States. GLAS received waveforms enable the estimation of SRTM radar phase center elevation biases and variability with ... within ICESat laser footprints. Distributions of ICESat minus SRTM elevation differences are quantified as a function of waveform extent (a measure of within-footprint relief), SRTM roughness (standard deviation of a 3 � 3 array ... derived from Moderate Resolution Imaging Spectrometer (MODIS) data. SRTM roughness is linearly correlated with waveform extent for ...
Tópico(s): Remote Sensing in Agriculture
2006 - American Society for Photogrammetry and Remote Sensing | Photogrammetric Engineering & Remote Sensing
... is applied for globally complete screening of two SRTM-based 3 arc-second DEMs, the SRTM v4.1 and the MERIT-DEM. Based on ... m slope threshold, 1341 artefacts were detected in SRTM v4.1 vs. 108 in MERIT. Most artefacts spatially correlate with SRTM voids (and thus with the void-filling) and not with the SRTM-measured elevations. The strong contrast in artefact frequency (factor ~12) is attributed to the SRTM v4.1 hole filling. Our study shows that over parts of the Himalaya Mountains the SRTM v4.1 data set is contaminated by step ...
Tópico(s): Soil Geostatistics and Mapping
2018 - Elsevier BV | Remote Sensing of Environment
Yanjun Su, Qinghua Guo, Qin Ma, Wenkai Li,
The Shuttle Radar Topography Mission (SRTM) digital elevation model (DEM) is one of the most complete and frequently used global-scale DEM products in various applications. However, previous studies have shown that the SRTM DEM is systematically higher than the actual land ... is to propose a procedure to calibrate the SRTM DEM over large vegetated mountain areas. Firstly, we ... was used to evaluate the accuracy of the SRTM DEM. Finally, a regression model of the SRTM DEM error depending on tree height, canopy cover, ...
Tópico(s): 3D Surveying and Cultural Heritage
2015 - Multidisciplinary Digital Publishing Institute | Remote Sensing
Manas Mukul, Vinee Srivastava, Malay Mukul,
The Shuttle Radar Topography Mission (SRTM) carried out in February 2000 has provided near global topographic data that has been widely used in many fields of earth ... m was achieved based on ground validation of SRTM data through various studies using global positioning system ( ... accuracy of both the X- and C-band SRTM datasets using data from the International GNSS Service ( ... stations), the error or difference between IGS and SRTM heights exhibits a non-normal distribution with a ... Africa, Australia and North America comply with the SRTM mission absolute vertical accuracy of 16 m (with ...
Tópico(s): Geophysics and Gravity Measurements
2015 - Springer Science+Business Media | Journal of Earth System Science
M. A. Hofton, R. Dubayah, J. B. Blair, D. L. Rabine,
The Shuttle Radar Topography Mission (SRTM) generated one of the most-complete high-resolution digital topographic data sets of the world to date. The elevations generated by ... LVIS) were used to assess the accuracy of SRTM elevations at study sites of variable relief, and ... Costa Rica were chosen where coincident LVIS and SRTM data occur. Both ground and canopy top lidar elevations were compared to the SRTM elevations. In “bare earth” regions, the mean vertical offset between the SRTM elevations and LVIS ground elevations varied with study ...
Tópico(s): Soil Geostatistics and Mapping
2006 - American Society for Photogrammetry and Remote Sensing | Photogrammetric Engineering & Remote Sensing
G. R. Hancock, Cristina Martinez, K. G. Evans, D. R. Moliere,
Abstract The recently released Shuttle Radar Topography Mission (SRTM) 3‐arc second digital elevation data set provides ... land surface. In this paper we examine the SRTM data for three catchments in Australia over a ... geomorphology. To test this new data set the SRTM data are compared with high resolution digital elevation ... therefore integrating catchment geology, climate and vegetation. The SRTM data were also assessed as input into the ... index. The results demonstrate that the 90 m SRTM data provide a poor catchment representation. Hillslopes appear ...
Tópico(s): Groundwater and Watershed Analysis
2006 - Wiley | Earth Surface Processes and Landforms
Konstantinos G. Nikolakopoulos, E. K. Kamaratakis, Nektarios Chrysoulakis,
The Shuttle Radar Topography Mission (SRTM) collected elevation data over 80% of earth's land area during an 11‐day Space Shuttle mission. With a horizontal resolution of 3 arc sec, SRTM represents the best quality, freely available digital elevation models (DEMs) worldwide. Since the SRTM elevation data are unedited, they contain occasional voids, ... In contrast to the short duration of the SRTM mission, the ongoing Advanced Spaceborne Thermal Emission and ... this paper we compared DEM products created from SRTM data with respective products created from ASTER stereo‐ ...
Tópico(s): 3D Surveying and Cultural Heritage
2006 - Taylor & Francis | International Journal of Remote Sensing
Chloe Brown, Kamal Sarabandi, L.E. Pierce,
The Shuttle Radar Topography Mission (SRTM) provided data for detailed topographical maps of about 80% of the Earth's land surface. SRTM consisted of single-pass C- and X-band ... synthetic aperture radars (INSARs). In order to utilize SRTM data in remote sensing applications the data must ... This paper presents The University of Michigan's SRTM calibration and validation campaign and our results using recently acquired C-band SRTM data of our calibration sites. An array of ... use in the calibration and validation work. The SRTM data used in this study are both Principal ...
Tópico(s): Landslides and related hazards
2005 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Geoscience and Remote Sensing
... vertical accuracy of the Shuttle Radar Topography Mission (SRTM DEM) was compared to Advanced Spaceborne Thermal Emission ... reservoirs in Tashkent region, Uzbekistan. Vertical differences between SRTM and ASTER products were computed the root mean ... RMSE) compared to GPS data. Results show that SRTM based measurements of ground control points (GCPs) exhibit ... RMSE results show that 12.82 m for SRTM, 15.77 m for ASTER. There are SRTM DEM outperforms ASTER DEM in detecting vertical accuracy. This indicates that ASTER DEM outperforms SRTM DEM in detecting vertical accuracy for the plane, ...
Tópico(s): Geophysics and Gravity Measurements
2020 - IOP Publishing | IOP Conference Series Materials Science and Engineering
Guoshuai Dong, Weimin Huang, William A. P. Smith, Peng Ren,
... data produced by the Shuttle Radar Topography Mission (SRTM) tend to have an abundance of voids in ... paper, deep learning models are investigated for restoring SRTM data. To this end, we explore generative adversarial ... the baseline method for filling voids in incomplete SRTM data. The problem regarding shadow violation that possibly ... remote sensing observations (i.e., the original incomplete SRTM data and satellite images) and the ground truth data (i.e., the complete SRTM data, which are manually refined from the incomplete ...
Tópico(s): Remote Sensing and LiDAR Applications
2019 - Elsevier BV | Remote Sensing of Environment
Xiaoqian Zhao, Yanjun Su, Tianyu Hu, Linhai Chen, Shang Gao, Rui Wang, Shichao Jin, Qinghua Guo,
... been found that the Shuttle Radar Topography Mission (SRTM) digital elevation model (DEM) is systematically higher than ... areas. This study developed a new globally corrected SRTM DEM through reducing its systematic bias in vegetated ... land cover data were collected to correct the SRTM DEM. A linear regression based method was used to estimate the original SRTM DEM error and therefore correct the SRTM DEM data. The results show that the original SRTM DEM data is around 6 m higher than ... on average across all vegetation types. Our corrected SRTM DEM data can significantly reduce the significant bias ...
Tópico(s): Synthetic Aperture Radar (SAR) Applications and Techniques
2018 - Taylor & Francis | Remote Sensing Letters
Produção Nacional
Revisado por pares
... Brazilian territory is presented through a comparison with SRTM, ASTER GDEM and ALOS AW3D30 DEMs in seven ... e., horizontal) resolution of TanDEM-X compared to SRTM and ASTER GDEM. In areas of open vegetation, ... the analyzed DEMs, such as mast oscillations in SRTM data and mismatch between adjacent scenes in ASTER ... X 12 m, TanDEM-X 30 m, and SRTM was observed in the steep slopes of the ... is strongly recommended to produce a DoD with SRTM before using ASTER GDEM or ALOS AW3D30 in ... in the time span between the acquisition of SRTM (2000) and TanDEM-X (2013) data, whether by ...
Tópico(s): Cryospheric studies and observations
2018 - Elsevier BV | Remote Sensing of Environment
Manas Mukul, Vinee Srivastava, Malay Mukul,
Global Shuttle Radar Topography Mission (SRTM) data products have been widely used in Earth Sciences without an estimation of their accuracy and reliability even though large outliers ... The global 1 arc-sec, 30 m resolution, SRTM C-Band (C-30) data collected in February ... 10.3 m which is close to the SRTM goal of an absolute vertical accuracy of RMSE ∼ ... GCPs, the error or difference between IGS and SRTM heights exhibited a non-normal distribution with a ... Australia, North and South America complied with the SRTM goal. At stations where all the X- and ...
Tópico(s): Soil Moisture and Remote Sensing
2016 - Springer Science+Business Media | Journal of Earth System Science
... based on NASA's Shuttle Radar Topography Mission (SRTM) have been widely used to evaluate threats from ... level rise, storm surge, and coastal floods. However, SRTM data are known to include large vertical errors ... population exposure assessments. We compare assessments based on SRTM data against references employing high-accuracy bare-earth ... both 1-arcsecond and 3-arcsecond horizontal resolution SRTM data systemically underestimate exposure across all assessed spatial ... the high tide line. At 3m, 1-arcsecond SRTM underestimates U.S. population exposure by more than ...
Tópico(s): Meteorological Phenomena and Simulations
2016 - Frontiers Media | Frontiers in Earth Science
Produção Nacional
Revisado por pares
... digital de elevação – MDE, utilizando imagens de radar SRTM com a finalidade de servir como subsídio à ... de radar da missão Shuttle Radar Topography Mission – SRTM, imagens obtidas do Google Earth e softwares específicos. ... strong>Palavras-Chave</strong>: Modelo Digital de Elevação, SRTM, Geotecnologias.</p><p><strong>Abstract</strong></p><p> ... to generate a digital elevation model - MDE using SRTM radar images in order to serve as a ... the mission radar images Shuttle Radar Topography Mission - SRTM, images obtained from Google Earth and specific software. ...
Tópico(s): Geography and Environmental Studies
2015 - PONTIFÍCIA UNIVERSIDADE CATÓLICA DE MINAS GERAIS | Caderno de Geografia
Arabinda Sharma, K. N. Tiwari,
The Shuttle Radar Topography Mission (SRTM) data has emerged as a global elevation data in the past one decade because of its free availability, homogeneity and consistent ... explores the consistency in hydrological behavior of the SRTM digital elevation model (DEM) with reference to easily ... indices was performed for comparative assessment of the SRTM DEM with respect to TOPO DEM. Results reveal that the vertical accuracy of SRTM DEM (±27.58 m) in the region is ... conservation priorities of microwatersheds of the catchment using SRTM DEM and TOPO DEM produce considerably different results. ...
Tópico(s): Hydrology and Sediment Transport Processes
2014 - Elsevier BV | Journal of Hydrology
... DEMs based on the Shuttle Radar Topography Mission (SRTM) as released by the United States Geological Survey ( ... 1) and by the Consortium for Spatial Information (SRTM CGIAR-CSI version 4.1) over the Australian ... generally shows a very good agreement between both SRTM DEMs; however, data voids contained in the USGS ... average height bias of –5 m relative to SRTM models. The root-mean square (RMS) height error obtained from the differences between ASTER GDEM2 and SRTM over Australia is found to be around 9. ... GDEM2 ∼ 8.5 m, SRTM3 USGS ∼ 6 m, SRTM CGIAR-CSI ∼ 4.5 m (RMS). In addition, ...
Tópico(s): Landslides and related hazards
2014 - Taylor & Francis | Australian Journal of Earth Sciences
Changwei Jing, Ashton Shortridge, S.C. Lin, Jiaping Wu,
... characteristics of existing versions of 3-arc-second SRTM and 1-arc-second GDEM over Anji County, ... 1:10 k topographic map. Results show that SRTM has higher accuracy (RMSE =12.44 m) than ... an overall 1/2 pixel shift exits in SRTM version 4.1. Although spurious elevations over omitted ... significant improvement over Version 1. Accuracies of both SRTM and GDEM decrease on steeper slopes. Aspect also ... is considerably higher than that in forested areas. SRTM version 4.1 and GDEM version 2 possessed ... of them failed to match their nominal accuracies. SRTM Version 4.1 could be the first choice, ...
Tópico(s): Hydrology and Watershed Management Studies
2013 - Taylor & Francis | International Journal of Digital Earth
Anne Henderson, Scott Wilkinson,
... the slope estimates of Shuttle Radar Topographic Mission (SRTM) DEMs with those generated by interpolation of topographic ... of DEM 'quality'), the 90?m (3-s) SRTM DEM provided the best estimates of slopes, being ... m reference DEM, the 30?m (1-s) SRTM-derived DEM-S, provided slope gradient estimates slightly ... biased towards under-prediction than the 90?m SRTM and significantly less biased on alluvial floodplains. In ... being 3-4% better than the 90?m SRTM. The slope errors in the interpolated DEMs translated ...
Tópico(s): Remote Sensing and LiDAR Applications
2012 - Elsevier BV | Environmental Modelling & Software
John Gallant, A. Read, T. I. Dowling,
... on the 1 second Shuttle Radar Topographic Mission (SRTM) elevation data. The SRTM data was corrected by removing voids, striping, tree ... not match the patterns of offsets in the SRTM elevations. The tree offset removal methods could be applied to the near-global SRTM DSM to produce a near-global bare-earth ... other sources. High resolution global DEMs other than SRTM are becoming available, notably ASTER GDEM and TANDEM- ... due to vegetation in the same way as SRTM. The tree offset removal methods developed for SRTM ...
Tópico(s): Soil Geostatistics and Mapping
2012 - Copernicus Publications | The international archives of the photogrammetry, remote sensing and spatial information sciences/International archives of the photogrammetry, remote sensing and spatial information sciences
Xiaodong Huang, Hongjie Xie, Tiangang Liang, Donghui Yi,
... 1064 nm channel) and Shuttle Radar Topography Mission (SRTM) DEM of 3 arcsec resolution (90 m) and ... ICESat elevation for different land covers and the SRTM DEM shows a stronger correlation with ICESat elevations ... stands, terrain slope or surface roughness increase. The SRTM DEM consistently shows a smaller vertical error than ... deviations of the elevation differences between ICESat and SRTM DEM and between ICESat and the map-based ... 01 m, respectively. Our results suggest that the SRTM DEM has a higher accuracy than the map- ...
Tópico(s): Climate change and permafrost
2011 - Taylor & Francis | International Journal of Remote Sensing
Tara LaLonde, Ashton Shortridge, Joseph P. Messina,
Abstract The Shuttle Radar Topography Mission (SRTM), the first relatively high spatial resolution near‐global digital elevation dataset, possesses great utility for a wide array of environmental applications worldwide. This article concerns the accuracy of SRTM in low‐relief areas with heterogeneous vegetation cover. Three questions were addressed about low‐relief SRTM topographic representation: to what extent are errors spatially ... dominant is the association of vegetation cover with SRTM elevation error? Two low‐relief sites in Louisiana, ...
Tópico(s): Soil erosion and sediment transport
2010 - Wiley | Transactions in GIS
Brian G. McAdoo, Neil Richardson, J. C. Borrero,
... scale using remotely sensed data (ASTER, QuickBird and SRTM). Using satellite data in disaster zones allows tsunami ... sensed observations. Median run‐up elevations extracted from SRTM and ASTER generated digital elevation models (DEMs) for ... Meulaboh, median run‐up elevations were 9 m (SRTM) and 6.6 m (ASTER) which are close ... in the floodplains (∼10 m in both the SRTM and ASTER data) and cliffs (32 m in the ASTER and less well‐defined in the SRTM data). Slope maps generated from SRTM and ASTER DEMs show that the inundation limit ...
Tópico(s): Geological and Geophysical Studies
2007 - Taylor & Francis | International Journal of Remote Sensing