Corangamite Coast Marine Habitat December 2009

This polygon layer represents shallow marine habitats in the Corangamite catchment coastal region mapped from aerial photography and underwater video ground-truthing. This mapping was funded by the Natural Heritage Trust to increase the capacity of natural resource managers to make informed decisions regarding asset identification, risk assessment and establishment of management action targets for nearshore marine habitats in the region. This layer combines two datasets for east and west Corrangamite into a single layer.

Data and Resources

Corangamite Coast Marine Habitat December 2009

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Additional information

Field Value
Date Published 2016-02-24
Date Updated 2019-04-18
Agency Department of Transport
License Creative Commons Attribution 4.0 International
[Open Data]
Citation Copyright © The State of Victoria, Department of Transport 2019
Attribution Copyright © The State of Victoria, Department of Transport 2019
Data Temporal Coverage: 2002-08-27 to 2008-04-09
Geospatial Coverage 141,-39,150,-34
Geospatial Scale 1:20,000 (Minimum)
Geospatial Accuracy The habitat layer attributes describe the dominant habitat (substratum). Overall mapping classification accuracy was determined by generating an error matrix from the video ground-truthing overlayed on the mapping. The overall mapping accuracy was 81.8% based on 143 video ground-truthing points. A lower producer's accuracy in classifying patchy reef (15.4% based on 26 video ground-truthing points) was primarily due to the different classification scale between the mapping from aerial imagery and underwater video interpretation. Areas classified as patchy reef in the video may have been mapped as multiple small separate areas of reef separated by sand. The mapping accuracy for all reef combined was 96% (91 of 95 video sites). Positional accuracy of the mapping is dependent on the accuracy of the source aerial photography (see the source imagery's metadata for more information), and the accuracy of the habitat boundaries is related to the mapping accuracy, which was determined by comparison with video-ground-truthing. No quantitative measure of positional accuracy was undertaken.
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Recent Downloads Count 3 (April 2016)