Module 4: Spatial Enhancement, Multispectral Data and Band Indices

 

    In this week's lab, we practiced using the USGS website to find and download our own satellite imagery for the purposes of conducting our own analysis as well as learning about the order and layering of bands and how they produce different radiometric signatures to stand out in imagery. 

    This was a long lab with a lot of learning opportunities when studying the effects of band indices on finding and displaying multispectral data and signatures. Using the metadata from the provided imagery layer of the State of Washington, we were able to learn and view the pixel values and frequencies of the signatures in the imagery. When tasked with the questions of locating the pixel spikes and what features they corresponded to, we had a lot of ability to applied what we learned to answer the questions. 

    The histograms, inquire cursor tool, and band combinations had me very engaged in solving the questions and I felt more and more confident as we moved forward with the questions. Clearing a view and reintroducing the image as gray scale really helped when trying to find features, as you could tell whether the feature was bright with the spike to the right in the histogram or dark if it was peaking on the left of the histogram. This allowed me to use the grayscale to locate features in one view and look at the corresponding linked true color view to identify the feature. 

    All in all, this was an extremely long and productive lab!