[Parameters: Topic='CRYOSPHERE', Term='SEA ICE', Variable_Level_1='ICE TYPES']
Use of a spatial expert system shell to develop automated techniques for detection and classification of sea ice in AVHRR imageryEntry ID: ASAC_907
Abstract: The development of an operational sea ice mapping system. This metadata record refers to the development and testing of an prototype system, ICEMAPPER, to interpret NOAA AVHRR imagery on a semi-automatic basis, off the Southern Ocean near to the Antarctic coast.
From the abstract of one of the referenced papers:
This paper reports work towards the development of a ... semi-automated technique for creating sea-ice and cloud maps from Advanced Very High Resolution Radiometer (AVHRR) images of the Southern Ocean near to the Antarctic coast. The technique is implemented as a computer-based system which applies a number of classification rules to the five bands of an AVHRR image and classifies each pixel in the image as representing open water, low cloud, high cloud or one of several different sea ice concentration categories. The map produced by the system is then displayed and an experienced sea ice forecaster evaluates the result. If it is deemed satisfactory the map is saved on disk. If not, the expert can alter various parameters within the classification rules to produce a satisfactory map. Experience so far has shown that judicious, but reasonably minor, changes to the rule parameters can produce a satisfactory sea-ice map relatively quickly in most cases. The system is also capable of effectively distinguishing cloudy from clear pixels but it does not accurately distinguish high cloud from low cloud in some of the images. Current work is being undertaken to improve the cloud classification rules.
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Start Date: 1995-09-30Stop Date: 1997-03-31
ISO Topic Category
Quality Values provided in temporal and spatial coverage are approximate only.
Access Constraints These data are not yet publicly available for download.
Publications from this project are available for download from the provided URL.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference at the provided URL when using these data.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 448 kb
Distribution Format: pdf
Role: TECHNICAL CONTACT
Phone: +61 3 6324 3480
Fax: +61 3 6324 3368
Email: R.Williams at utas.edu.au
SCHOOL OF COMPUTING PO BOX 1214 University of Tasmania
Province or State: Tasmania
Postal Code: 7250
Role: DIF AUTHOR
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: dave.connell at aad.gov.au
Australian Antarctic Division 203 Channel Highway
Province or State: Tasmania
Postal Code: 7050
Publications are attached to the GET DATA url.
Williams R.N., Michael K.J., Pendlebury S. (1997) A semi-automated technique for creating sea ice and total cloud maps from AVHRR images. Antarctic CRC Symposium on Antarctica and Global Change: Interactions and Impacts, Hobart, Tasmania, 13-18 July, 1997.
Williams R.N., Crowther P., Hartnett J. (1996) An image analysis ... development system, with artificial intelligence capabilities, designed for glaciological applications. Proceedings of the Eighth Australasian Remote Sensing Conference 27.
Williams R.N., Hartnett J. (1996) A prototype sea ice mapping system using a geographical information system and expert knowledge. Proceedings of the 1996 IEEE International Geoscience and Remote Sensing Symposium 1111-1113.
Williams R.N., Crowther P., Pendlebury S. (1997) Design and development of an operational sea ice mapping system for meteorological applications in the Antarctic. Proceedings of the 1997 IEEE Intermational Geoscience and Remote Sensing Symposium 1689-1691.
Creation and Review Dates
DIF Creation Date: 2000-08-08
Last DIF Revision Date: 2010-07-26