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Reduced-Resolution Radar Imagery, Digital Elevation Models, and Related GIS Layers for Barrow, Alaska, USA

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Entry ID

ARCSS303

Summary

This product set contains reduced-resolution Interferometric Synthetic Aperture Radar (IFSAR) imagery and geospatial data for the Barrow Peninsula (155.39 - 157.48 deg W, 70.86 - 71.47 deg N), for use in Geographic Information Systems (GIS) and remote sensing software. The primary IFSAR data sets were acquired by Intermap Technologies from 27 to 29 July 2002, and consist of an Orthorectified Radar Imagery (ORRI), a Digital Surface Model (DSM), and a Digital Terrain Model (DTM).

Derived data layers include aspect, shaded relief, and slope-angle grids (floating-point binary format), as well as a vector layer of contour lines (ESRI Shapefile format). Also available are accessory layers compiled from other sources: 1:250,000- and 1:63,360-scale USGS Digital Raster Graphic (DRG) mosaic images (GeoTIFF format); 1:250,000- and 1:63,360-scale USGS quadrangle index maps (ESRI Shapefile format); and a simple polygon layer of the extent of the Barrow Peninsula (ESRI Shapefile format).

The DSM and DTM data sets (20 m resolution) are provided in floating-point binary format with header and projection files. The ORRI mosaic (5 m resolution) is available in GeoTIFF format. FGDC-compliant metadata for all data sets are provided in text, HTML, and XML formats, along with the Intermap License Agreement and product handbook. The baseline geospatial data support education, outreach, and multi-disciplinary research of environmental change in Barrow, which is an area of focused scientific interest. Data are available via FTP and CD-ROM.

Geographic Coverage

 

Spatial Coordinates:
N: 71.47278°     S: 70.86246°     E: -155.39483°     W: -157.47633°    

Data Set Citation

Dataset Creator: Manley, W. F., L. R. Lestak, C. E.Tweedie, and J. A. Maslanik.
Dataset Title: Reduced-Resolution Radar Imagery, Digital Elevation Models, and Related GIS Layers for Barrow, Alaska, USA
Dataset Release Date: 2005-02-01
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/arcss303.html

Temporal Coverage

Start Date: 2002-07-27
Stop Date: 2002-07-29

Data Resolution

Latitude Resolution: 1.25 m
Longitude Resolution: 1.25 m

Latitude Resolution: 5 m
Longitude Resolution: 5 m

Location Keywords

  • CONTINENT NORTH AMERICA UNITED STATES OF AMERICA ALASKA

Science Keywords

  • Land Surface Topography Contours
  • Land Surface Topography Contours
  • Land Surface Topography Terrain Elevation
  • Land Surface Topography Terrain Elevation
  • Land Surface Topography Topographical Relief
  • Land Surface Topography Topographical Relief
  • Land Surface Topography Topographic Effects
  • Land Surface Topography Topographic Effects
  • Spectral/Engineering Radar Radar Imagery
  • Spectral/Engineering Radar Radar Imagery
  • Spectral/Engineering Radar Radar Reflectivity
  • Spectral/Engineering Radar Radar Reflectivity

Ancillary Keywords

  • ARCSS Data Coordination Center
  • Aspect
  • Barrow
  • Cartography
  • Contours
  • Digital Elevation Model
  • Digital Mapping
  • Digital Surface Model
  • Digital Terrain Model
  • GIS
  • IFSAR
  • Mapping
  • Maps
  • NSIDC > National Snow and Ice Data Center
  • OPP0224071
  • ORRI > Orthorectified Radar Imagery
  • Radar
  • Relief
  • SAR imagery
  • Slope
  • Surface Elevation
  • Terrain Elevation
  • Topographic Maps

ISO Topic Category (View Definitions)

  • Geoscientific Information

Platform

  • AIRCRAFT

Instrument

  • RADAR Radio Detection and Ranging
  • SAR Synthetic Aperture Radar

Project

  • NSF/OPP Division of Polar Programs, Antarctic Research, Glaciology

Quality

Quality checks were performed throughout all processing steps. Minimum and maximum domain values were checked for each tile, for merged and mosaicked products. Map extents of separate tiles are correct. Overlaps between tiles are seamless and contain identical values; these were also spot checked for the Barrow Triangle area. Value-added layers and their ranges were quality checked; these value-added layers were also used to quality check the values in the DSM. The vertical accuracy of DSMs and DTMs is approximately +/- 1.0 m or better root-mean-square-error (RMSE). Horizontal accuracy is +/- 2.5 m or better RMSE for slopes less than 20 deg. Horizontal accuracy of ORRI data is +/- 1.25 m or better RMSE for slopes less than 20 deg. These accuracy statements depend on the sensor's view of the ground, and are applicable to the height of the first surface return. These statements also assume the surface is devoid of vegetation or continuous roof coverage in urban areas (Intermap 2002).

Accuracy statements are based on areas of moderate terrain. Diminished accuracies are to be expected in areas of extreme terrain and dense vegetation. The DSM and DTM contain some small (30 to 50 cm high) ripples or 'corn rows.' The Intermap data collection systems are very accurately calibrated to control the constant differential phase error between the antennae. The calibration ensures that data are within specification; however, on flat terrain, very low-level artifacts are present from uncompensated differential phase errors. Very small periodic DEM ripples in the range dimension occurred at a consistent location in range and are continuous along the strip. High-frequency variation (speckle) exists in both the imagery and terrain data sets. The high-frequency variation in the DEM is a product of the signal-to-noise ratio that decreases from the near to far range across the track; therefore, the noise increases with the distance from the antenna. The difference in noise between the near and far range of the strip can sometimes be seen at the seam where DEMs from two strips are mosaicked together.

Data Set Progress

complete

Data Center

National Snow and Ice Data Center
Data Center URL: http://nsidc.org

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

The Advanced Cooperative Arctic Data & Information Service
Data Center URL: nsidc.org

Data Center Personnel

Name: ACADIS User Services
Phone: 303 492-6199 x
Email: nsidc@nsidc.org
Contact Address:

  • University of Colorado
  • 449 UCB

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Distribution

Distribution Media: CD-ROM
Distribution Size: 805 MB
Distribution Format: Binary

Distribution Media: FTP
Distribution Size: 805 MB
Distribution Format: Binary

Distribution Media: CD-ROM
Distribution Size: 805 MB
Distribution Format: ESRI Shapefiles (.shp, .shx, .dbf, and .prj)

Distribution Media: FTP
Distribution Size: 805 MB
Distribution Format: ESRI Shapefiles (.shp, .shx, .dbf, and .prj)

Distribution Media: CD-ROM
Distribution Size: 805 MB
Distribution Format: Geographic Tagged Image File Format (GeoTIFF) (.geotiff)

Distribution Media: FTP
Distribution Size: 805 MB
Distribution Format: Geographic Tagged Image File Format (GeoTIFF) (.geotiff)

Personnel

William F. Manley
Role: INVESTIGATOR
Contact Address:

  • Institute of Arctic and Alpine Research (INSTAAR)
  • 450 UCB
  • University of Colorado

City: Boulder
Province or State: CO

Leanne R. Lestak
Role: INVESTIGATOR
Contact Address:

  • Cooperative Institute for Research in Environmental Sciences (CIRES)
  • University of Colorado
  • 216 UCB

City: Boulder
Province or State: CO
Postal Code: 80309-0216
Country: USA

Craig Tweedie
Role: INVESTIGATOR
Email: ctweedie@utep.edu
Contact Address:

  • University of Texas at El Paso
  • Department of Biology
  • 500 University Blvd.
  • Biology Bldg., Room 226

City: El Paso
Province or State: TX
Postal Code: 79968-0513
Country: USA

Jim Maslanik
Role: INVESTIGATOR
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@kryos.colorado.edu
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309

Related URL

VIEW PROJECT HOME PAGE
IFSAR & Quickbird Imagery and Related GIS Data for Barrow, Alaska, USA

VIEW PROJECT HOME PAGE
Imagery and Related GIS Data for Barrow, Alaska, USA

VIEW PROJECT HOME PAGE
Product Description at Quaternary GIS Laboratory

Reference

Intermap Technologies, Inc. 2002. GLOBAL terrain product handbook and quick start guide. Englewood, CO, USA: Intermap Technologies Inc.

Tennant, J.K., T. Coyne, and E. DeCol. 2003. Star-3i interferometric synthetic aperture radar (INSAR): more lessons learned on the road to commercialization. Calgary, Alberta: Intermap Technologies Corp.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2005-02-01
Last DIF Revision Date: 2014-03-12

Metadata Views

DIF Text-Only

Directory Interchange Format (DIF) in plain text

DIF XML

Directory Interchange Format (DIF) in Extensible Markup Language (XML)

FGDC HTML

U.S. Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM)

ISO HTML

International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata

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