Module 5a - Intro to ERDAS Imagine & Electromagnetic Radiation (EMR)

We began this week's module by observing how wavelength, frequency, and energy of electromagnetic radiation (EMR) are calculated. There are two fundamental equations in understanding how EMR works in relation to remote sensing that are important to remember: Maxwell's Wave Theory and Planck's Relation.

Then, we commenced our very first exercise exploring the basic tools in ERDAS Imagine, such as Zoom, Raster Options, window Viewers, File Type formats, the Multispectral Tab, and more.

For our lab assignment, we were tasked to created a subset (this is basically like a cropped or clipped image of a larger image) of a Landsat Thematic Mapper (TM) imagery of forested lands at Olympic National Park in Washington State. We created this subset using the Inquire Box tool. Then we added a new column to its attribute table to obtain the area (in hectares) of the subset created. After saving the subset with its new attribute features, I finalized my map product (shown above) using ArcMap.