Multi Spectral Analysis

This week in lab we gain more information about spectral bands, band ratios, spectral properties of vegetation.  We explored some vegetation indices: NDVI, SAVI and EVI.  And we discussed spectral enhancements in the form of Tasselled cap and Principle Components Analysis.

In lab we continue to utilize ERDAS to explore Image Histograms.  We gained experience operating the inquire cursor, interpret histogram data, and identifying features by interpreting digital data.

I must admit that I am unsure of my results this week.  I worked through the lab instructions and made it to the deliverable assignment and read it and thought I do not know how to do that!  But I kept playing around in ERDAS.  I examined the histogram, and looked at the image in gray scale and as multispectral changing the band combination.  I looked at the histogram again, still not sure what I am supposed to be getting.  Then I remembered the histogram X axis is the brightness and the Y axis the frequency of that brightness.So then I had some clues directing to bright objects or dark objects and how frequent.  Then in grey scale I looked for changes to the imagery in different bands.  And I repeated that some with the multispectral and adjusted the bands (not so much time here because I could keep trying different combinations for days).  Then I utilized the Inquire Cursor to see if I had put the clues together in an area the meet the pixel values provided.  I could be totally wrong on this one.  But I tried to follow the clues as best I could and I came up with answers, and SOME COOL (may be correct) MAPS.