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Global Change Master Directory (GCMD)
Antarctic iceberg sizes and spatial distribution from SAR image analysis - Map
Entry ID: AAD_Ant_iceberg_SAR


Summary
Abstract: This map shows the distribution of the iceberg data extracted from ERS SAR images.

Icebergs are identified in Synthetic Aperture Radar [SAR] images by image analysis using the texture and intensity of the microwave backscatter observations. The images are segmented using an edge detecting algorithm, and segments identified as iceberg or background, which may be sea ice, open water, or a mixture of both. Dimensions of the icebergs are derived by spatial analysis of the corresponding image segments. Location of the iceberg is derived from its position within the image and the navigation data that gives the location and orientation of the image.

More than 20,000 individual observations have been extracted from SAR images acquired by the European Space Agency's ERS-1 and 2 satellites and the Canadian Space Agency's Radarsat satellite. Because images can overlap, some proportion of the observations represent multiple observations of the same set of icebergs.

Most observations relate to the sector between longitudes 70E and 135E. The data set includes observations from several other discrete areas around the Antarctic coast. In general observations are within 200 km of the coast but in limited areas extend to about 500 km from the coast.

This metadata record has been derived from work performed under the auspices of ASAC project 2187 (ASAC_2187).

The map in the pdf file shows the extent of the coverage of individual SAR scenes used in the analysis and the abundance and size characteristics (by a limited colour palette) of the identified icebergs.

Related URL
Link: View Related Information
Description: Download point for the data - map


Link: View Related Information
Description: Public information for ASAC project 2187


Link: View Related Information
Description: Citation reference for this metadata record and dataset

Geographic Coverage
 N: -55.0 S: -80.0  E: 135.0  W: 70.0

Data Set Citation
Dataset Creator: Young, N.W. and Williams, R.
Dataset Title: Antarctic iceberg sizes and spatial distribution from SAR image analysis - Map
Dataset Series Name: CAASM Metadata
Dataset Release Date: 2001-05-29
Dataset Publisher: Australian Antarctic Data Centre
Version: 1
Online Resource: https://data.aad.gov.au/metadata/records/AAD_Ant_iceberg_SAR


Temporal Coverage
Start Date: 1991-09-01
Stop Date: 1991-09-01


Location Keywords
OCEAN > SOUTHERN OCEAN
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


Data Resolution
Latitude Resolution: 30 Metre(s)
Longitude Resolution: 30 Metre(s)


Science Keywords
CRYOSPHERE >SEA ICE >ICEBERGS    [Definition]


Platform
ERS-1 >European Remote Sensing Satellite-1    [Information]
ERS-2 >European Remote Sensing Satellite-2    [Information]
RADARSAT-1    [Information]


Instrument
SAR >Synthetic Aperture Radar    [Information]


Access Constraints
A PDF version of the map is available for download from the provided URL.


Use Constraints
This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAD_Ant_... when using these data.


Keywords
IMAGE ANALYSIS
ICEBERG
MICROWAVE
SAR
SATELLITE
SYNTHETIC APERTURE RADAR
TEXTURE


Data Set Progress
COMPLETE


Originating Center
Australian Antarctic Division


Data Center
Australian Antarctic Data Centre, Australia    [Information]
Data Center URL: http://data.aad.gov.au

Data Center Personnel
Name: DATA OFFICER AADC
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: metadata at aad.gov.au
Contact Address:
Australian Antarctic Division
203 Channel Highway
City: Kingston
Province or State: Tasmania
Postal Code: 7050
Country: Australia



Distribution
Distribution_Media: HTTP
Distribution_Size: 1,119 kb
Distribution_Format: pdf
Fees: free


Personnel
NEAL W YOUNG
Role: INVESTIGATOR
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Contact Address:
ACE CRC AND AUSTRALIAN ANTARCTIC DIVISION
Private Bag 80
City: Hobart
Province or State: Tasmania
Postal Code: 7001
Country: Australia


RAYMOND WILLIAMS
Role: INVESTIGATOR
Phone: +61 3 6324 3480
Fax: +61 3 6324 3368
Email: R.Williams at utas.edu.au
Contact Address:
SCHOOL OF COMPUTING
PO BOX 1214
University of Tasmania
City: Launceston
Province or State: Tasmania
Postal Code: 7250
Country: Australia


Publications/References
Young, N.W., D. Turner, G. Hyland and R.N. Williams (1998), Near coastal iceberg distributions in East Antarctica 50E - 145E., Annals of Glaciology, 27, 68-74

Williams, R.N., Rees, G. and Young, N.W. (1999), A technique for the identification and analysis of icebergs in synthetic aperture radar images of Antarctica., International Journal of Remote Sensing, 20, 15-16, 3183-3199, doi:doi:10.1080/014311699211697
Extended Metadata Properties
(Click to view more)

Creation and Review Dates
DIF Creation Date: 2001-05-29
Last DIF Revision Date: 2019-04-02



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