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Lacy Smith Geog 342 12/13/2010. Project Sites & Background.

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Presentation on theme: "Lacy Smith Geog 342 12/13/2010. Project Sites & Background."— Presentation transcript:

1 Lacy Smith Geog /13/2010

2 Project Sites & Background

3 Objective Pond 3: Can I assess Spartina foliosa colonization using true color aerial photography? How has the pond land cover changed since restoration? Fagan Marsh: Can I isolate salt marsh channels using true color aerial photography?

4 Methods ArcGIS NAIP 2005, 2009 imagery for Solano and Napa counties Site polygon outlines Training set polygons -> spectral signatures Pond 3: Spartina foliosa, algae, water, mudflat Fagan Marsh: channels, bare ground, marsh vegetation Spatial Analyst Multivariate Maximum Likelihood Classification Classification to image comparison

5 Pond 3 – initial classification

6 Pond 3 - problems

7 Pond 3 – final classification Land Cover% of Pond 2005% of Pond 2009 Spartina foliosa--< 1 Algae2731 Water6454 Mudflat915

8 Fagan Marsh

9 Fagan Marsh – Channel Analysis

10 Conclusions Difficult to distinguish vegetation types using imagery with only 3 spectral bands If you want it to be much more accurate essential to invest the extra money Tidal channels with different water levels have too many spectral signatures that are similar to those of the vegetation and bare ground


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