Data Access
Overview
This product contains evergreen and seasonally-green
vegetation indices.
The data has been derived from the Moderate Resolution Imaging
Spectroradiometer (MODIS) sensor's Normalised Difference Vegetation Index
(NDVI) and Enhanced Vegetation Index (EVI) image products (MOD13Q1). The algorithm was adapted from: Lu, H., Raupach,
M. R., McVicar, T. R. & Barrett, D. J. (2003). Decomposition of vegetation
cover into woody and herbaceous components using AVHRR NDVI time series. Remote
Sensing of Environment 86(1), 1-18.
More details are available in the
Download guide and full details will be
provided in future publications.
Currently, due to space limitations on the server, only data for eastern Australia can be downloaded. However, data for the rest of Australia is available. Please contact Tony Gill (t.gill1@uq.edu.au) for more details.
Data description
- layers: The Image data contains 2 layers: 1) evergreen VI, 2) seasonal VI
- Projection:Geographic, WGS-84
- code values:
|
Image Value |
Meaning |
|
-10000 |
no data |
|
other values |
vegetation index scaled by 10000 |
Publications
Gill, T. K., Phinn, S. R., Armston, J. D., Pailthorpe B. A. (2009). Estimating tree-cover change in Australia: challenges of using the MODIS vegetation index product. International Journal of Remote Sensing, 30(6), 1547-1566.
Gill, T. K., J. D. Armston, S. R. Phinn and B. A. Pailthorpe
(2006). A comparison of MODIS time-series decomposition methods for estimating
evergreen foliage cover. 13th Australasian Remote Sensing and Photogrammetry
Conference,
Citing the dataset
The Dataset can be cited as:
Gill, T. K., Armston, J. D., Phinn, S. R., Pailthorpe B. A. (2008), Evergreen
and Seasonally-green vegetation indices in Australia, The
University of Queensland, St Lucia, Australia. URL:http://www.gpa.uq.edu.au/CRSSIS/tools/TGill/
Poster
Estimates of vegetation evergreen (mainly tree) and seasonally-green (main grass) vegetation cover for Australia can be derived from the products.
You can download a poster of the work. Two versions are available: 300dpi (7.5MB) or 600dpi (35MB).
Known Problems
See the download guide for a list of known problems.
Copyright
The
Product Disclaimer
The copyright holders permit any person to reproduce or copy
this publication or any part of it for the purposes of research, scientific
advancement, academic discussion, record-keeping, free distribution,
educational use or for any other public use or benefit provided that any such
reproduction or copy (in part or in whole) acknowledges the permission of the
copyright holders and expressly includes a reservation of the copyright
holders' commercial rights in terms as stated in the paragraph immediately
below.
All commercial rights are reserved and no part of this publication covered by
copyright may be reproduced or copied in any form or by any means for the
purpose of acquiring profit or generating monies through commercially
exploiting (including but not limited to sales) any part of or the whole of
this publication except with the written permission of the copyright holders.
Important Disclaimer
The copyright holders advise that the information available from this website
is to be used as a management tool only. The information is able to determine
Foliage Projective Cover within an estimated accuracy specified in the relevant
scientific publications. The user needs to be aware that the quality and
geo-positional accuracy of the information cannot be guaranteed. No reliance or
actions must therefore be made on this information without seeking prior expert
professional, scientific and technical advice.
To the extent permitted by law, the copyright holders (including its employees
and consultants) exclude all liability to any person for any consequences,
including but not limited to all losses, damages, costs, expenses and any other
compensation, arising directly or indirectly from using this website (in part
or in whole) and any information or material contained in it.
Acknowledgements
The MODIS data used in this study were acquired as part of
the NASA's Earth Science
The source for the MODIS vegetation continuous fields data
set (MOD44B) was the
The
Professor Michael Hill from the University of North Dakota and Professor Damian Barrett from The University of Queensland provided valuable reviews during the preparation of the journal manuscript resulting from this work.