scholarly journals Vertical Accuracy Assessment of ALOS PALSAR, GMTED2010, SRTM and Topodata Digital Elevation Models

2021 ◽  
Author(s):  
Zuleide Ferreira ◽  
Pedro Cabral
Keyword(s):  
Accuracy Assessment ◽  
Digital Elevation Models ◽  
Alos Palsar ◽  
Digital Elevation ◽  
Vertical Accuracy

Vertical accuracy assessment of freely available digital elevation models over low-lying coastal plains

2015 ◽  
Vol 9 (3) ◽  
pp. 252-271 ◽  
Author(s):  
Xiaoping Du ◽  
Huadong Guo ◽  
Xiangtao Fan ◽  
Junjie Zhu ◽  
Zhenzhen Yan ◽  
...  
Keyword(s):  
Accuracy Assessment ◽  
Digital Elevation Models ◽  
Coastal Plains ◽  
Digital Elevation ◽  
Vertical Accuracy

Accuracy assessment of lidar-derived digital elevation models

2008 ◽  
Vol 23 (122) ◽  
pp. 148-169 ◽  
Author(s):  
Fernando J. Aguilar ◽  
Jon. P. Mills
Keyword(s):  
Accuracy Assessment ◽  
Digital Elevation Models ◽  
Digital Elevation

scholarly journals A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: methods and accuracy assessment

2012 ◽  
Vol 4 (1) ◽  
pp. 129-142 ◽  
Author(s):  
A. J. Cook ◽  
T. Murray ◽  
A. Luckman ◽  
D. G. Vaughan ◽  
N. E. Barrand
Keyword(s):  
Digital Elevation Model ◽  
Antarctic Peninsula ◽  
Accuracy Assessment ◽  
Correction Method ◽  
Pixel Size ◽  
Aster Gdem ◽  
Digital Elevation ◽  
Vertical Accuracy ◽  
Elevation Model ◽  
The Antarctic

Abstract. A high resolution surface topography Digital Elevation Model (DEM) is required to underpin studies of the complex glacier system on the Antarctic Peninsula. A complete DEM with better than 200 m pixel size and high positional and vertical accuracy would enable mapping of all significant glacial basins and provide a dataset for glacier morphology analyses. No currently available DEM meets these specifications. We present a new 100-m DEM of the Antarctic Peninsula (63–70° S), based on ASTER Global Digital Elevation Model (GDEM) data. The raw GDEM products are of high-quality on the rugged terrain and coastal-regions of the Antarctic Peninsula and have good geospatial accuracy, but they also contain large errors on ice-covered terrain and we seek to minimise these artefacts. Conventional data correction techniques do not work so we have developed a method that significantly improves the dataset, smoothing the erroneous regions and hence creating a DEM with a pixel size of 100 m that will be suitable for many glaciological applications. We evaluate the new DEM using ICESat-derived elevations, and perform horizontal and vertical accuracy assessments based on GPS positions, SPOT-5 DEMs and the Landsat Image Mosaic of Antarctica (LIMA) imagery. The new DEM has a mean elevation difference of −4 m (± 25 m RMSE) from ICESat (compared to −13 m mean and ±97 m RMSE for the original ASTER GDEM), and a horizontal error of less than 2 pixels, although elevation accuracies are lower on mountain peaks and steep-sided slopes. The correction method significantly reduces errors on low relief slopes and therefore the DEM can be regarded as suitable for topographical studies such as measuring the geometry and ice flow properties of glaciers on the Antarctic Peninsula. The DEM is available for download from the NSIDC website: http://nsidc.org/data/nsidc-0516.html (doi:10.5060/D47P8W9D).

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