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'.

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.