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Use of stereo aerial photography for quantifying changes in the extent and height of mangroves in tropical Australia


Lucas, RM and Ellison, JC and Mitchell, A and Donnelly, B and Finlayson, M and Milne, AK, Use of stereo aerial photography for quantifying changes in the extent and height of mangroves in tropical Australia, Wetlands Ecology and Management, 10, (2) pp. 161-175. ISSN 0923-4861 (2002) [Refereed Article]

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DOI: doi:10.1023/A:1016547214434


The study investigated the use of aerial photographs, acquired in 1950 and1991, for assessing the temporal dynamics of mangroves along the WestAlligator River in Australia's Northern Territory. For both years,mangrove extent was mapped using an unsupervised classification of thedigital orthomosaic and Digital Elevation Models (DEMs), or height maps,of the mangrove canopy were derived from stereo pairs. Helicopter andfield observations in 1998 and 1999 respectively provided ground truthfor interpreting the derived datasets. The comparison of mangrove extentrevealed a substantial movement over the 41-year period, perhaps inresponse to hydrological changes that have resulted in a landward extensionof saline conditions. Changes in the height of mangroves were observedbut were difficult to quantify due to the reduced quality of the 1950 DEM. The study demonstrated the viability of using time-series of aerialphotography for monitoring and understanding the long-term response ofmangroves to environmental change, including hydrological variations andsea level rise.

Item Details

Item Type:Refereed Article
Keywords:aerial photography, Australia, Digital Elevation Models, historical change, sea level rise, mangroves
Research Division:Engineering
Research Group:Geomatic engineering
Research Field:Photogrammetry and remote sensing
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Coastal or estuarine biodiversity
UTAS Author:Ellison, JC (Associate Professor Joanna Ellison)
ID Code:24553
Year Published:2002
Deposited By:Geography and Environmental Studies
Deposited On:2002-08-01
Last Modified:2010-06-29
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