Lab 8 - Thermal & Multispectral Analysis

This week's lab focused on interpreting thermal imagery using ERDAS Imagine and ArcGIS.  To this end we each had to select a unique feature on a multispectral composite image of the Pensacola, Florida and analyze how it appears in various wavelengths.

Comparison of how a sandbar is viewed using various views of multispectral imagery.

The wavy appearance of the sandbars along the northern shorelines caught my eye, so I'd decided to focus on how these appear within various wavelengths.  While the sandbars are visible in just about all of the combined multispectral imagery, when viewed within separate bands it was almost impossible to see.  The contrast, or brightness values, had to be altered in most cases.  The only individual bands that the sandbar was semi-visible in was within Band 4 (a near infrared band) and Band 6 (a thermal infrared band).