Time-series of seagrass maps from 1972 to 2010, in Moreton Bay, Australia, with links to GeoTIFFs

Lyons, Mitchell, Phinn, Stuart R. and Roelfsema, Christiaan M. (2015): Time-series of seagrass maps from 1972 to 2010, in Moreton Bay, Australia, with links to GeoTIFFs. Pangaea. Dataset. doi:10.1594/PANGAEA.843545


 
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Project name Eastern Banks Time Series Seagrass Analsys
Project description
Long term global archives of high-moderate spatial resolution, multi-spectral satellite imagery are now readily accessible, but are not being fully utilised by management agencies due to the lack of appropriate methods to consistently produce accurate and timely management ready information. This work developed an object-based remote sensing approach to map land cover and seagrass distribution in an Australian coastal environment for a 38 year Landsat image time-series archive (1972-2010).  Land cover was mapped annually using vegetation, bare ground, urban and agricultural classes. Seagrass distribution was also mapped annually, and in some years monthly, via horizontal projected foliage cover classes, sand and deep water. Land cover products were validated using aerial photography and seagrass maps were validated with field survey data, producing several measures of accuracy. An average overall accuracy of 65% and 80% was reported for seagrass and land cover products respectively, which is consistent with other studies in the area. This study is the first to show moderate spatial resolution, long term annual changes in land cover and seagrass in an Australian environment, created without the use of in situ data; and only one of a few similar studies globally. The land cover products identify several long term trends; such as significant increases in South East Queensland's urban density and extent, vegetation clearing in rural and rural-residential areas, and inter-annual variation in dry vegetation types in western South East Queensland. The seagrass cover products show that there has been a minimal overall change in seagrass extent, but that seagrass cover level distribution is extremely dynamic; evidenced by large scale migrations of higher seagrass cover levels and several sudden and significant changes in cover level. These mapping products will allow management agencies to build a baseline assessment of their resources, understand past changes and help inform implementation and planning of management policy to address potential future changes.
Contact name Christiaan M. Roelfsema
Contact email c.roelfsema@uq.edu.au
Creator name Lyons, Mitchell
Phinn, Stuart R.
Roelfsema, Christiaan M.
Creator(s) role Principal Investigator
Dataset name Time-series of seagrass maps from 1972 to 2010, in Moreton Bay, Australia, with links to GeoTIFFs
Dataset description
This work developed an object-based remote sensing approach to map land cover and seagrass distribution in an Australian coastal environment for a 38 year Landsat image time-series archive (1972-2010). Landsat Multi-Spectral Scanner (MSS), Thematic Mapper (TM) and Enhanced Thematic Mapper (ETM+) imagery were used without in situ field data input (but still using field knowledge) to produce land and seagrass cover maps every year data were available, resulting in over 60 map products over the 38 year archive.
Access conditions Open Access
Licencing and terms of access Creative Commons Attribution (only)

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ANZSRC Field of Research (FoR) Code 050205 Environmental Management
050202 Conservation and Biodiversity
04 Earth Sciences
040699 Physical Geography and Environmental Geoscience not elsewhere classified
DOI 10.1594/PANGAEA.843545
Type of data Images
GeoTIFF
Data Volume 117 data points
Language eng
Time coverage start date 1972
Time coverage end date 2010
Keyword Seagrass
Landsat Data
Time series analysis
Habitat Mapping
Moreton Bay (Qld)
Geographic co-ordinates

153.444414,-27.062415 153.082523,-27.062415 153.082523,-27.483262 153.444414,-27.483262 153.444414,-27.062415

Collection type Dataset
Publisher Pangaea
Publication Year 2015
Copyright notice 2015, The University of Queensland

 
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Created: Tue, 17 Mar 2015, 11:13:31 EST by Susan Wilson