Journal article
Multi-temporal AVHRR digital data: an approach for landcover mapping of heterogeneous landscapes
Geocarto International, Vol.6(4), pp.5-20
1991
Abstract
A multi-temporal sequence of seven NOAA-n, Advanced Very High Resolution Radiometer (AVHRR) satellite scenes (April 10, May 18, June 6, June 29, July 20, and August 18, 1987) were composited to derive cover-type information in the heterogeneous landscape of University Lake Watershed, North Carolina, U.S.A. The Normalized Difference Vegetation Index (NDVI) was calculated for each scene and merged into a seven-dimensional dataset, representing each time period sampled. An unsupervised classification was performed on the multi-temporal composite to derive five cover-type classes. Similar classifications were generated on single scene information. Ground control information was derived from an unsupervised classification of one kilometer grid compositional percentages initially derived from photo-interpreted landcover information. The multi-temporal NDVI classification more consistently characterized phenologic responses on a spatially dissected landscape than single scene clustering. Sub-pixel information showed how the algorithm separated compositional information between classes. Temporal vectors were plotted to illustrate differentiation on the basis of NDVI profiles.
Details
- Title
- Multi-temporal AVHRR digital data: an approach for landcover mapping of heterogeneous landscapes
- Authors
- C G Fleischmann (Author) - University of North Carolina at Chapel Hill, United StatesStephen J Walsh (Author) - University of North Carolina at Chapel Hill, United States
- Publication details
- Geocarto International, Vol.6(4), pp.5-20
- Publisher
- Taylor & Francis Ltd.
- Date published
- 1991
- DOI
- 10.1080/10106049109354336
- ISSN
- 1010-6049
- Organisation Unit
- University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99449911902621
- Output Type
- Journal article
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