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A New 100-m Digital Elevation Model of the Antarctic Peninsula Derived from Aster Global Dem: Methods and Accuracy Assessment : Volume 5, Issue 1 (15/05/2012)

By Cook, A. J.

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Book Id: WPLBN0004007640
Format Type: PDF Article :
File Size: Pages 39
Reproduction Date: 2015

Title: A New 100-m Digital Elevation Model of the Antarctic Peninsula Derived from Aster Global Dem: Methods and Accuracy Assessment : Volume 5, Issue 1 (15/05/2012)  
Author: Cook, A. J.
Volume: Vol. 5, Issue 1
Language: English
Subject: Science, Earth, System
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Luckman, A., Vaughan, D. G., Murray, T., Cook, A. J., & Barrand, N. E. (2012). A New 100-m Digital Elevation Model of the Antarctic Peninsula Derived from Aster Global Dem: Methods and Accuracy Assessment : Volume 5, Issue 1 (15/05/2012). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Geography, Swansea University, Swansea, SA2 8PP, UK. 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 this specification. 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 +3 m (±26 m RMSE) from ICESat, 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/dems/datasets.html (http://dx.doi.org/10.5060/D47P8W9D).

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

Excerpt
ASTER GDEM Validation Team: METI/ERSDAC, NASA/LPDAAC, USGS/EROS, In cooperation with NGA and other collaborators, ASTER GDEM Validation Summary Report, available at: http://www.jspacesystems.or.jp/ersdac/GDEM/E/image/ASTERGDEM_ValidationSummaryReport_Ver1.pdf, 2009.; ASTER GDEM Validation Team: ASTER Global Digital Elevation Model Version 2 – Summary of Validation Results, NASA Land Processes Distributed Active Archive Center and Joint Japan-US ASTER Science Team, available at: http://www.jspacesystems.or.jp/ersdac/GDEM/ver2Validation/Summary_GDEM2_validation_report_final.pdf, 2011.; BAS, SPRI, and WCMC: Antarctic digital database user's guide and reference manual, Scientific Committee on Antarctic Research, Cambridge, 1993.; BAS: Adelaide Island and Arrowsmith Peninsula, 1:250 000 scale, BAS SR 19–20/14 (extended), British Antarctic Survey, 2010a.; BAS: Northern Antarctic Peninsula, 1:250 000, BAS(UKAHT) Sheet 3A and 3B, 1st Edn., British Antarctic Survey, 2010b.; Bindschadler, R., Vornberger, P., Fleming, A., Fox, A., Mullins, J., Binnie, D., Paulsen, S. J., Granneman, B., and Gorodetzky, D.: The Landsat Image Mosaic of Antarctica, Remote Sens. Environ., 112, 4214–4226, doi:10.1016/j.rse.2008.07.006, 2008.; Cook, A., Fox, A. J., Vaughan, D. G., and Ferrigno, J. G.: Retreating glacier-fronts on the Antarctic Peninsula over the last 50 years, Science, 22, 541–544, 2005.; Cziferszky, A., Fleming, A., and Fox, A.: An assessment of ASTER elevation data over glaciated terrain on Pourquoi Pas Island, Antarctic Peninsula, in: Elevation Models for Geoscience, edited by: Gibbs, S., Geological Society Special Publications, 2010.; ESRI: Environmental Systems Research Institute, ARC/INFO User's Guide: Cell-based Modeling with GRID, Redlands, California, 1991.; Glasser, N. F., Scambos, T. A., Bohlander, J., Truffer, M., Pettit, E., and Davies, B. J.: From ice-shelf tributary to tidewater glacier: continued rapid recession, acceleration and thinning of Rohss Glacier following the 1995 collapse of the Prince Gustav Ice Shelf, Antarctic Peninsula, J. Glaciol., 57, 397–406, 2011.; Hutchinson, M. F.: A new procedure for gridding elevation and stream line data with automatic removal of spurious pits, J. Hydrol., 106, 211–232, doi:10.1016/0022-1694(89)90073-5, 1989.; Hvidegaard, S. M., Sorensen, L. S., and Forsberg, R.: ASTER GDEM validation using LiDAR data over coastal regions of Greenland, Remote Sens. Lett., 3, 85–91, doi:10.1080/01431161.2010.527389, 2012.; Jezek, K. C.: Glaciological properties of the Antarctic ice sheet from RADARSAT-1 synthetic aperture radar imagery, Ann. Glaciol., 29, 286–290, 1999.; Kääb, A., Huggel, C., Paul, F., Wessels, R., Raup, B., Kieffer, H., and Kargel, J. S.: Glacier monitoring from ASTER imagery: accuracy and applications, EARSeL eProceedings No. 2, 43–53, 2002.; Korona, J., Berthier, E., Bernard, M., Remy, F., and Thouvenot, E.: SPIRIT. SPOT 5 stereoscopic survey of Polar Ice: Reference Images and Topographies during the fourth International Polar Year (2007–2009), ISPRS-J. Photogramm. Remote Sens., 64, 204–212, doi:10.1016/j.isprsjprs.2008.10.005, 2009.; Liu, H., Jezek, K., Li, B., and Zhao, Z.: Radarsat Antarctic Mapping Project Digital Elevation Model version 2, National Snow and Ice Data Center, v2, 2001.; Liu, H. X., Jezek, K. C., and Li, B.: Development of Antarctic DEM by integrating cartographic and remotely sensed data: A GIS-based approach, J. Geophys. Res., 104, 23199–23

 

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