CHAPTER ELEVEN

Figure 11.2. Redcedar cover in the study area estimated from spectral mixture analysis of Landsat 7 ETM+ imagery. While redcedar invasion into the grassland is pervasive, only a very small area (<1%) in the study areas are covered with close redcedar (redcedar fraction > 80%). Most areas have redcedar coverage between 25% - 50%, indicating the relative new encroachment of the woody species. The large area with less than 25% redcedar in this study area strongly implies that redcedar cover is overestimated at low values. Further work is needed to refine the SMA model to reduce the uncertainty at low redcedar coverage estimate. (Price, unpublished data)

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