GIS5027 Module 3: Intro to ERDAS Imagine and Digital Data

    This week’s lab focused on a brief EMR properties calculation session and giving us an introduction to ERDAS Imagine. We used Maxwell’s Wave Theory (C=lamda/nu) to see mathematically how the relationship between frequency and wavelength of electromagnetic radiation relate to each other (the smaller the wavelength, the higher the frequency). We used the Planck Relation (Q=h(nu)) to then show that the shorter the wavelength, the greater the energy per light photon in Joules. 

    Once done calculating, we dived into ERDAS Imagine. We learned about the basic tools, how to use the Viewer, and finally used the Inquire Box to help snap a portion of a provided thematic map with a focus on Olympic National Park, WA into a subset of the image. We added a new Area field to the attribute table within ERDAS Imagine, and once down, we added our subset into ArcGIS to be able to create a presentable map (see below).

Thematic map of a subset (or portion) of Olympic National Park, WA

    The above map indicates that there is more NW Vegetation (679.64 acres) compared to the other classifications in the provided legend. 

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