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Polar Ice Sheet DEMs and Elevation Data |
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 Data and Documents |
Alaska North Slope 100 m Digital Elevation Model (DEM) |
| Coverage | Brooks Range and the North Slope of Alaska, including a small area of Canada. Bounding coordinates are: 168.8°W - 139.5°W, 66.9°N - 71.6°N. |
| Sources | National Elevation Dataset DEMs and GTOPO30 DEM (Canada only) |
| Medium | FTP |
| Grid scale | 100 m |
| Ellipsoid | Clarke 1866 |
| Geoid | NAD27 |
| Investigator(s) | William Manley |
| This DEM was created by merging 100 National Elevation Dataset DEM tiles for areas of Alaska north of 67°N. A small area of Canada, derived from the global GTOPO30 DEM, is also included. The resulting DEM is in the Alaska Albers conical equal area projection, using the North American Datum of 1927 (NAD27). Data are available in GeoTIFF, Arc/INFO grid, and binary Band Interleaved by Line (BIL) formats. | |
| Data and Documents |
Antarctic 5-km Digital Elevation Model from ERS-1 Altimetry |
| Coverage | Antarctica, from 65° to 90° South latitude |
| Sources | ERS-1 (Radar Altimeter) |
| Medium | FTP |
| Grid scale | 5 km |
| Ellipsoid | WGS84 |
| Geoid | OSU91A |
| Investigator(s) | Jonathan Bamber |
| DEM data are provided as a single ASCII text file, accessible by ftp. Columns represent geodetic latitude and longitude, elevation with reference to the OSU91A geoid, and the difference between the OSU91A geoid and WGS84 ellipsoid. | |
| Data and Documents |
Digital SAR Mosaic and Elevation Map of the Greenland Ice Sheet (includes KMS Eckholm DEM) |
| Coverage | Greenland |
| Sources | ERS-1 (SAR, Radar Altimeter), GEOSAT (Radar Altimeter) field surveys, aerial photographs, Airborne Radar Altimetry (GAP, AIM), maps |
| Medium | CD-ROM |
| Grid scale | 0.06 degrees longitude by 0.02 degrees latitude |
| Ellipsoid | WGS84 |
| Geoid | OSU91A |
| Investigator(s) | Mark Fahnestock, Simon Ekholm, Ken Knowles, Ron Kwok, Ted Scambos |
| Includes NSIDC's limb (large image map browser) software, which allows Unix users to easily select and view portions of the mosaic image. The mosaic and elevation data are available for non-profit, research-oriented purposes only. Prospective users of the product are required to complete a Research Agreement stating that the image and elevation data will only be used under the specified terms and conditions. | |
| Data and Documents |
Elevation Change of the Southern Greenland Ice Sheet from 1978-88 |
| Coverage | Southern Greenland (61° to 72°N, 30° to 50°W) |
| Sources | GEOSAT and SEASAT |
| Medium | FTP |
| Grid scale | 50 km |
| Investigator(s) | Curt Davis, Craig Kluever, Bruce Haines |
| The addition of GEOSAT Geodetic Mission (GM) data results in twice as many crossover points and 50% greater coverage than previous studies. Coverage above 2000 m elevation is improved to 90%, and about 75% of the area between 1700 m and 2000 m is now covered. Data are in ASCII text format and consist of elevation change rate (dH/dt, cm/year) and corresponding error estimates in 50 km grid cells. | |
| Data and Documents |
ETOP05 Elevation Data for Areas Greater than 50°North |
| Coverage | circumpolar north of 50°N |
| Sources | DBDB5, FNOC, DMA |
| Medium | FTP |
| Grid scale | 9.8 km |
| Investigator(s) | Michael Loughridge, George Sharman |
| ETOP05 is a collection of several gridded elevation data sets, combined into a single, global coverage. | |
| Data and Documents |
GEOSAT Radar Altimetry Atlas of the Antarctic North of 72.1 Degrees South |
| Coverage | Antarctica (up to 72.1 degrees South) |
| Sources | GEOSAT |
| Medium | FTP |
| Grid scale | 3 km |
| Investigator(s) | Ute Herzfeld |
| The investigators used a kriging technique for the spatial interpolation. The 28 atlas pages are available in both UTM and latitude/longitude coordinates. | |
| Data and Documents |
GLAS/Icesat L1 and L2 Global Altimetry Data |
| Coverage | Spatial coverage is global between 86°N and 86°S. |
| Sources | Geoscience Laser Altimetry System (GLAS) instrument aboard the Ice, Cloud, and land Elevation (ICESat) satellite. |
| Medium | FTP, CD-ROM, DVD, DLT, or 8-mm tape |
| Grid scale | These data are not gridded. The centers of 60 m spots illuminated by the laser on the Earth's surface are separated in the along-track direction by 172 m. |
| Ellipsoid | N/A |
| Geoid | N/A |
| Investigator(s) | H. Jay Zwally, Bob Schutz, Charles Bentley, Jack Bufton, Jean-Bernard Minster, James Spinhirne, and Robert Thomas |
Level-1A altimetry data (GLA01) include the transmitted and received waveforms from the instrument. Level-1B waveform parameterization data (GLA05) include output parameters from the waveform characterization procedure and other parameters required to calculate surface slope and relief characteristics. Level-1B elevation data (GLA06) include surface elevation, surface roughness assuming no slope, surface slope assuming no roughness, and geodetic and atmospheric corrections for range measurements. Both Level-1B products are geolocated to the center of the laser footprint. GLA06 is used in conjunction with GLA05 to create the Level-2 altimetry products (GLA12-15). Level-2 altimetry data provide surface elevations for ice sheets (GLA12), sea ice (GLA13), land (GLA14), and oceans (GLA15). Data also include the laser footprint gelocation and reflectance, as well as geodetic, instrument, and atmospheric corrections for range measurements. |
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| Data and Documents |
Greenland 5 km DEM, Ice Thickness, and Bedrock Elevation Grids |
| Coverage | Greenland |
| Sources | ERS-1 and Geosat (Radar Altimeters), ice penetrating radar data from University of Kansas and Technical University of Denmark, Airborne Topographic Mapper (ATM) data, digital height data from photogrammetric analysis of aerial photos, and recently unclassified DEMs provided by U.S. National Imaging and Mapping Agency (NIMA) |
| Medium | FTP |
| Grid scale | 5 km |
| Ellipsoid | WGS84 |
| Geoid | OSU91A |
| Investigator(s) | Jonathan Bamber |
| A Digital Elevation Model (DEM), ice thickness grid, and bedrock elevation grid of Greenland are provided in ASCII text format at a 5 km grid spacing in a polar stereographic projection. | |
| Data and Documents |
High-Resolution Radar Imagery, Digital Elevation Models, and Related GIS Layers for Barrow, Alaska, USA |
| Coverage | Barrow, Alaska, USA (155.39° to 157.48°W, 70.86° to 71.47°N) |
| Sources | Airborne Interferometric Synthetic Aperture Radar (IFSAR) instrument from Intermap Technologies, Inc. |
| Medium | DVD |
| Grid scale | 1.25 m, 5 m |
| Ellipsoid | NAD83 |
| Investigator(s) | William Manley, Leanne Lestak, Craig Tweedie, James Maslanik |
Primary GIS layers include:
Derived data layers include:
Accessory data layers include:
FGDC-compliant metadata for all data sets are provided in text, HTML, and XML formats, along with the Intermap License Agreement and product handbook. Data are available on five DVDs and are restricted to NSF-funded investigators. To place an order, visit the NSIDC catalog description for this data set. Click "Register for Data" and read the license agreement. Scroll to the end of the agreement to accept it. You will be directed to a registration form; please complete this and provide your most recent NSF grant number. NSIDC User Services will verify the grant number and contact you soon with an order confirmation. |
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| Data and Documents |
Ice Thickness and Surface Elevation, Southeastern Ross Embayment, West Antarctica |
| Coverage | West Antarctica |
| Sources | laser altimeter and ice-penetrating radar mounted on a Twin Otter aircraft |
| Medium | FTP |
| Ellipsoid | WGS84 |
| Investigator(s) | Donald Blankenship et al. |
| Ice surface elevations and ice thickness data, derived from laser altimetry and radar sounding results, are available in ASCII format via ftp. These data are a result of the Corridor Aerogeophysics of the Southeastern Ross Transect Zone (CASERTZ) experiments of the 1990s. | |
| Data and Documents |
Radarsat Antarctic Mapping Project Digital Elevation Model Version 2 |
| Coverage | Antarctica, from 60° to 90° South latitude |
| Sources | ERS-1 (radar altimeter), airborne radar echo sounding, station-based radar sounding, GPS surveys, geodetic maps |
| Medium | FTP |
| Grid scale | 1 km, 400 m, 200 m |
| Ellipsoid | WGS84 |
| Geoid | OSU91A |
| Investigator(s) | Hongxing Liu, Kenneth Jezek, Biyan Li, Zhiyuan Zhao |
| Version 2 improves upon the original version by incorporating new topographic data, error corrections, extended coverage, and other modifications. The 1 km, 400 m, and 200 m DEM data are provided in ARC/INFO and binary grid formats, and the 1 km and 400 m DEMs are also available in ASCII format. |
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| Data and Documents |
Reduced-Resolution Radar Imagery, Digital Elevation Models, and Related GIS Layers for Barrow, Alaska, USA |
| Coverage | Barrow, Alaska, USA (155.39° to 157.48°W, 70.86° to 71.47°N) |
| Sources | Airborne Interferometric Synthetic Aperture Radar (IFSAR) instrument from Intermap Technologies, Inc. |
| Medium | DVD |
| Grid scale | 1.25 m, 5 m |
| Ellipsoid | NAD83 |
| Investigator(s) | William Manley, Leanne Lestak, Craig Tweedie, James Maslanik |
Primary GIS layers include:
Derived data layers include:
Accessory data layers include:
FGDC-compliant metadata for all data sets are provided in text, HTML, and XML formats, along with the Intermap License Agreement and product handbook. |
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| Data and Documents |
Roosevelt Island Bedrock and Surface Elevations |
| Coverage | Roosevelt Island, Antarctica (79.45° to 79.59°S, 159.81° to 161.53°W) |
| Sources | Ground-penetrating radar |
| Medium | FTP |
| Grid scale | N/A |
| Ellipsoid | WGS84 | Investigator(s) | Howard Conway |
| Bedrock and surface elevation readings were taken by ground penetrating radar (GPR) and Global Positioning System (GPS) between November and December 1997. | |
| Data and Documents |
SEASAT and GEOSAT Altimetry Data for the Antarctic and Greenland Ice Sheets (IAS-1) |
| Coverage | Antarctica (up to 72.1 degrees South) and Greenland (up to 72.1 degrees North) |
| Sources | GEOSAT and SEASAT |
| Medium | CD-ROM |
| Grid scale | 10 km |
| Ellipsoid | WGS84 |
| Geoid | OSU91A |
| Investigator(s) | Jay Zwally, Robert Bindschadler, Anita Brenner, John DiMarzio |
| The CD-ROM includes software to extract and browse subsets of these data, as well as to view pre-generated contours of the gridded data and groundtracks of the full-rate data. CD-ROM produced by Jay Zwally, Anita Brenner, and John DiMarzio. | |
| Data and Documents |
Surface Elevation and Ice Thickness, Western Marie Byrd Land, Antarctica |
| Coverage | Marie Byrd Land sector of West Antarctica, including the Ford Ranges, the Sulzberger Ice Shelf, much of the Edward VII Peninsula, and the Shirase Coast region of the eastern Ross Ice Shelf |
| Sources | Airborne radar |
| Medium | FTP |
| Grid scale | See description below. |
| Ellipsoid | WGS84 |
| Investigator(s) | Bruce Luyendyk, Douglas Wilson |
| This study measured surface and base ice elevations by radar and strength of magnetic and gravity fields. Track spacing was either 5.3 or 10.6 km over most of the area. The 60 MHz radar system usually provided good images of the base of the ice for thicknesses less than 1 km but rarely imaged thicknesses greater than 1.5 km. Data formats for all observations include files for original flight profiles and grids of edited data at 1.06 km node spacing. | |
