Mangrove extent from 2002 CASI data, Kakadu NP, NT

This data set consists of a shapefile/kml of mangrove extent for the lower reaches of the West Alligator River Kakadu National Park, with this generated from airborne Compact Airborne Spectrographic Imager (CASI) hyperspectral data data acquired in 2011. Information on the details of the attribute fields for the KakaduNP_2002.shp are located in this document in the section titled 'file.attributes'.

Data Link

Catalog https://dap.tern.org.au/thredds/catalog/landscapes/remote_sensing/mangroves/Kakadu_NP/Mangrove_Extent_Maps/Areas_for_subsets/catalog.html

Data Licence and Access Rights

Item	Detail

Item	Detail
Rights	Copyright (UNSW). Rights owned by University of New South Wales (UNSW). Rights licensed subject to Licence Creative Commons Attribution (CC BY 4.0).
License	Creative Commons Attribution 4.0 License, http://creativecommons.org/licenses/by/4.0 .
Access	These data can be freely downloaded and used subject to the CC BY licence. Attribution and citation is required as described at http://www.auscover.org.au/citation . We ask that you send us citations and copies of publications arising from work that use these data.

Point of contact

Item	Detail

Item	Detail
Name	Richard Lucas
Organisation	Aberystwyth University/University of New South Wales
Position	Research Professor/Adjunct Professor
Email	richard.lucas@aber.ac.uk/richard.lucas@unsw.edu.au
Role	Data custodian

Item	Detail

Item	Detail
Name	Anthea Mitchell
Organisation	University of New South Wales
Position	JRSRP Research Fellow
Email	anthea.mitchell@unsw.edu.au
Role	Data custodian

Additional references

Lucas, R.M., Finlaysson, C.M., Bartolo, R., Rogers, K., Mitchell, A., Woodroffe, C.D., Asbridge, E.F. and Ens, E. (2017). Historical perspectives on the mangroves of Kakadu National Park. Marine and Freshwater Research (in press).
Lucas, R.M., Rowlands, A.R., Niemann, O. and Merton, R. (2004). Hyperspectral Sensors: Past, Present and Future. In: Advanced Image Processing Techniques for Remotely Sensed Hyperspectral Data, P.K. Varshney and M.K. Arora (Eds), pp. 11-49.

Spatial and Temporal extents

Item	Detail

Item	Detail
Typical spatial resolution	The original data were acquired at 1 m spatial resolution
Spatial coverage	UL 201216.00,8638096.0; LR 208238.0,8649006.0
Temporal resolution	7th July 2002
Temporal coverage	One day
Sensor(s) and platform	Compact Airborne Spectrographic Imager (CASI).
Item	Detail
Spatial representation type	Shapefile (.shp)
Spatial reference system	EPSG: 32753, WGS 84 UTM Zone 53S

File names and descriptions

Label	Detail	Format

Label	Detail	Format
2002_CASI_Extent_WA	West Alligator River 2002 CASI data (corrected to surface reflectance, %; bands 1-5)	.shp

Abstract or Summary

From hyperspectral Compact Airborne Spectrographic imager (CASI) data acquired over the mouth of the West Alligator River in Kakadu National Park, mangroves were mapped by first applying a fine scale spectral difference segmentation within eCognition to the blue, red and near infrared wavelength regions. A maximum likelihood (ML) algorithm within the environment for visualizing images (ENVI) software was then used to classify all segments using training areas associated with mangroves, but also water, mud- flats, sandflats, and coastal woodlands. These were identified through visual interpretation of the imagery. With reference to the CASI data, all segments were examined individually and methodically to determine whether they should be reallocated to a non-mangrove class (e.g., mudflats) or as mangrove. Open woodlands dominated by Eucalyptus species were also able to visually identified within CASI data, although their discrimination was assisted by only considering areas where the underlying LiDAR DTM exceeded 10 m, with these associated with the tidally inundated sections.