ERDAS Imagine is another one of the primary softwares that we are using within this course. This week was an intro to it, and a look at some practical uses with Landsat Thematic Mapper imagery. Along with the basic ERDAS functionality, I looked into pre-processing an image within on software, then compiling a useable map within another, ArcGIS Pro in this case.
The imagery software was used to organize and display a pre-classified image. In this case, the subject area is in the Olympic National Park area of Washington State. I chose the Mt. Lawson region and derived a subset image from a broader view of the park. The software was used to identify the area in hectares associated with all of the different classification types. Additionally, there were several themes explored while working with this and other images. Specifically looking at how spectral, spatial, and temporal resolution all work with different image types, and even multispectral images allowing for multi-band presentations.
While the above is a relatively simplistic map, the majority of the exploration for this weeks lab was within the ERDAS software itself. Additionally, there was an emphasis on understanding wavelength, frequency, and energy, associated with different portions of the electromagnetic spectrum. A couple key takeaways for this work were that the shorter the wavelength, the higher the frequency. The greater the frequency, the greater the energy.
I look forward to moving into understanding how to do this type of image classification with the software and working to better incorporate multispectral imagery. Thank you for coming along with me.
v/r
Brandon
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