9104d465-76e6-4eed-b306-2d4d72441c84 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-06-23T12:07:10 creation ISO 19115 2016 Use of a spatial expert system shell to develop automated techniques for detection and classification of sea ice in AVHRR imagery 9104d465-76e6-4eed-b306-2d4d72441c84 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. {"type": "Polygon", "coordinates": [[[62.0, -70.0], [159.0, -70.0], [159.0, -60.0], [62.0, -60.0], [62.0, -70.0]]]} 62.0 159.0 -70.0 -60.0 ACE/CRC AMD AMD/AU AVHRR AVHRR > Advanced Very High Resolution Radiometer CEOS CONTINENT > ANTARCTICA EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE TYPES GEOGRAPHIC REGION > POLAR SATELLITES sea ice PROJECT HOME PAGE documentDigital Public information for ASAC project 907 HTML VIEW RELATED INFORMATION > PUBLICATIONS documentDigital Download point for the papers - AAD Staff Only HTML VIEW RELATED INFORMATION documentDigital Citation reference for this metadata record and dataset HTML Creative Commons by Attribution logo documentDigital PNG