Use of a spatial expert system shell to develop automated techniques for detection and classification of sea ice in AVHRR imagery

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.

Identification info

Alternate title: Use of a spatial expert system shell to develop automated techniques for detection and classification of sea ice in AVHRR imagery

Date (Publication): 2000-08-08

Edition: 1

Originator

Williams, R.

Publisher

Australian Antarctic Data Centre

Principal investigator

WILLIAMS, RAYMOND

University of Tasmania

Launceston

Tasmania

7250

Australia

Collaborator

WILLIAMS, RAYMOND

University of Tasmania

Launceston

Tasmania

7250

Australia

Name: CAASM Metadata

Other citation details: Restricted access

Website: https://data.aad.gov.au/metadata/records/ASAC_907

Status: Completed

Custodian

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)

Australian Antarctic Division

203 Channel Highway

Kingston

Tasmania

7050

Australia

+61 3 6232 3244

+61 3 6232 3351 (facsimile)

Topic category

Oceans

Extent

Description: Temporal Coverage

Temporal extent

TimePeriod: 1995-09-30 1997-03-31

Title: A semi-automated technique for creating sea ice and total cloud maps from AVHRR images.

Date (Publication): 1997

Author

Williams R.N., Michael K.J., Pendlebury S.

Name: Antarctic CRC Symposium on Antarctica and Global Change: Interactions and Impacts

Other citation details: Hobart, Tasmania, 13-18 July, 1997.

Title: An image analysis development system, with artificial intelligence capabilities, designed for glaciological applications.

Date (Publication): 1996

Author

Williams R.N., Crowther P., Hartnett J.

Name: Proceedings of the Eighth Australasian Remote Sensing Conference

Page: 27

Title: A prototype sea ice mapping system using a geographical information system and expert knowledge.

Date (Publication): 1996

Author

Williams R.N., Hartnett J.

Name: Proceedings of the 1996 IEEE International Geoscience and Remote Sensing Symposium

Page: 1111-1113

Title: Design and development of an operational sea ice mapping system for meteorological applications in the Antarctic.

Date (Publication): 1997