The main goal of this lab was for us to gain experience with measuring and interpreting spectral reflectance or signatures of different features that are found on the Earth's surface and near different surface materials that have been captured by satellite images. The outcome of this lab is for us to be able to collect multiple spectral signatures from remotely sensed images, look at the bands of each feature analyze them and graph them.To practice these skills we used Landsat ETM+ images of Wisconsin and we were to digitize and record the different spectral signatures of the various features below.
To find all of these spectral signatures, all we had to do was upload the image then go to the draw tab on the application and click on polygon. We needed to draw a polygon around any land or feature that was on that list or that one was interested in using the signature editing tool on. The signature editing tool is located under the raster tab, after collecting all of the data that was on the list this is what my graph ended up looking like when comparing all of the features that I had collected.
After all of the data was collected and then projected on the graph above, one can tell which features are absorbing the most energy and that plants generally reflect the most green light since they are absorbing the longer wavelengths. This lab was one of the more helpful labs, I will be able to use this skill in my future with remote sensing and in our final project, because this skill helps us track the function of different systems that are found in the environment.
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