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    <title>UTas ePrints - Use of stereo aerial photography for quantifying changes in the extent and height of mangroves in tropical Australia</title>
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<meta content="The study investigated the use of aerial photographs, acquired in 1950 and 1991, for assessing the temporal dynamics
of mangroves along theWest Alligator River in Australia’s Northern Territory. For both years, mangrove extent
was mapped using an unsupervised classification of the digital orthomosaic and Digital ElevationModels (DEMs),
or height maps, of the mangrove canopy were derived from stereo pairs. Helicopter and field observations in 1998
and 1999 respectively provided ground truth for interpreting the derived datasets. The comparison of mangrove
extent revealed a substantial movement over the 41-year period, perhaps in response to hydrological changes that
have resulted in a landward extension of saline conditions. Changes in the height of mangroves were observed but
were difficult to quantify due to the reduced quality of the 1950 DEM. The study demonstrated the viability of
using time-series of aerial photography for monitoring and understanding the long-term response of mangroves to
environmental change, including hydrological variations and sea level rise." name="eprints.abstract" />
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<meta content="Avery, T.E. and Berlin, G.L. 1992. Fundamentals of Remote Sensing
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Unit, Research School of Pacific and Asian Studies, Australian
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Bandaranayake, W.M. 1994. Phyto-chemical constituents and pigments
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T., Pidgeon, B., Walden, D. and Waterman, P. 1997. Vulnerability
assessment of predicted climate change and sea level rise
in the Alligator River Region, N.T., Australia. Supervising Scientist
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Canberra, Australia.
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of the Marine Environment Report for Australia. Great Barrier
Reef Marine Park Authority, Townsville, Australia." name="eprints.referencetext" />
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was mapped using an unsupervised classification of the digital orthomosaic and Digital ElevationModels (DEMs),
or height maps, of the mangrove canopy were derived from stereo pairs. Helicopter and field observations in 1998
and 1999 respectively provided ground truth for interpreting the derived datasets. The comparison of mangrove
extent revealed a substantial movement over the 41-year period, perhaps in response to hydrological changes that
have resulted in a landward extension of saline conditions. Changes in the height of mangroves were observed but
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    <h1 class="ep_tm_pagetitle">Use of stereo aerial photography for quantifying changes in the extent and height of mangroves in tropical Australia</h1>
    <p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Lucas, R.M.</span> and <span class="person_name">Ellison, J.C.</span> and <span class="person_name">Mitchell, A</span> and <span class="person_name">Donnelly, B</span> and <span class="person_name">Finlayson, M.</span> and <span class="person_name">Milne, T.</span> (2002) <xhtml:em>Use of stereo aerial photography for quantifying changes in the extent and height of mangroves in tropical Australia.</xhtml:em> Wetlands Ecology and Management, 10 (2). pp. 161-175. ISSN 0923-4861</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a href="http://eprints.utas.edu.au/3054/1/Lucas_et_al_2002.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/3054/1/Lucas_et_al_2002.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />649Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="4190" name="docid" type="hidden" /><div class=""><input value="Request a copy" name="_action_null" class="ep_form_action_button" onclick="return EPJS_button_pushed( '_action_null' )" type="submit" /> </div></form></td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://dx.doi.org/10.1023/A:1016547214434">http://dx.doi.org/10.1023/A:1016547214434</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">The study investigated the use of aerial photographs, acquired in 1950 and 1991, for assessing the temporal dynamics&#13;
of mangroves along theWest Alligator River in Australia’s Northern Territory. For both years, mangrove extent&#13;
was mapped using an unsupervised classification of the digital orthomosaic and Digital ElevationModels (DEMs),&#13;
or height maps, of the mangrove canopy were derived from stereo pairs. Helicopter and field observations in 1998&#13;
and 1999 respectively provided ground truth for interpreting the derived datasets. The comparison of mangrove&#13;
extent revealed a substantial movement over the 41-year period, perhaps in response to hydrological changes that&#13;
have resulted in a landward extension of saline conditions. Changes in the height of mangroves were observed but&#13;
were difficult to quantify due to the reduced quality of the 1950 DEM. The study demonstrated the viability of&#13;
using time-series of aerial photography for monitoring and understanding the long-term response of mangroves to&#13;
environmental change, including hydrological variations and sea level rise.</p></div><table style="margin-bottom: 1em" cellpadding="3" class="not_ep_block" border="0"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Additional Information:</th><td valign="top" class="ep_row">The original publication is available at www.springerlink.com&#13;
</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">aerial photography, Australia, Digital Elevation Models, historical change, sea level rise, mangroves</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/210000.html">210000 Science - General</a><br /><a href="http://eprints.utas.edu.au/view/subjects/300902.html">300000 Agricultural, Veterinary and Environmental Sciences &gt; 300900 Land, Parks and Agriculture Management &gt; 300902 Land and Parks Management</a></td></tr><tr><th valign="top" class="ep_row">Collections:</th><td valign="top" class="ep_row">UNSPECIFIED</td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">3054</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Dr Joanna Ellison</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">21 Jan 2008 09:57</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">21 Jan 2008 09:57</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=3054;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&amp;eprintid=3054">item control page</a></p>
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