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    Seasonal differences assist in mapping granite outcrops using Landsat TM imagery across the Southwest Australian Floristic Region

    Access Status
    Fulltext not available
    Authors
    Alibegovic, G.
    Schut, A.
    Wardell-Johnson, Grant
    Robinson, Todd
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Alibegovic, G. and Schut, A. and Wardell-Johnson, G. and Robinson, T. 2015. Seasonal differences assist in mapping granite outcrops using Landsat TM imagery across the Southwest Australian Floristic Region. Journal of Spatial Science. 60 (1): pp. 37-49.
    Source Title
    Journal of Spatial Science
    DOI
    10.1080/14498596.2014.952253
    ISSN
    1449-8596
    School
    Department of Environment and Agriculture
    URI
    http://hdl.handle.net/20.500.11937/26560
    Collection
    • Curtin Research Publications
    Abstract

    Knowledge of the location and extent of granite outcrops (GOs) in the Southwest Australian Floristic Region is important to understand their role as refugia. We present a methodology to map GOs using biannual Landsat TM imagery. An adaptive vegetation cover mask capitalising on seasonal differences, combined with a supervised classification, allowed differentiation of granite from other land covers on five GOs across the rainfall gradient. This methodology provided high classification accuracy (Overall Kappa ranged from 0.83 to 0.91) irrespective of location. Therefore, there is potential to use these methods to compile a more complete GO inventory over the region.

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