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Exercise 1: Introduction to ERDAS Imagine
Satellite Digital Image Processing
Document Updated: November 2007 Software Version: ERDAS Imagine 9.1

Exercise Objective • To familiarize yourself with the basics of ERDAS Imagine.
Required Data • wforig.img —A 30-meter, raw Landsat TM scene of Salt Lake City, UT and the Wasatch Mountains Introduction Before you start processing imagery, it would be wise to learn a few of the basics that can improve your understanding of and efficiency using ERDAS Imagine. The goal of this exercise to introduce you to ERDAS Imagine and to help familiarize you with the basics. The major steps are: I. Create your Class Data Directory Structure II. Set Preferences III. Display a Single Image Band IV. Display a Multispectral Image I. Create your Class Data Directory Structure File management is far more important than the emphasis that is usually put on it--it is very easy to lose track of files in an image-processing project. Fortunately, if you make an effort to manage your files, you have the tools to keep everything well organized. In the Windows computing environment, Windows Explorer is the most common tool for file and directory management. In addition, ERDAS Imagine has preferences you set to specify default input and output directories. Being familiar with these simple techniques will not assure you of maintaining a reasonable hold on your data but being unfamiliar with them will assure that your data is not being maintained appropriately. Start Windows Explorer and create the folder \erdas_data ( is the hard drive of your choice with at least 200 Mbytes of free space). This will be the location where you will download and access your data for this course. You have any number of options for organizing your data below this directory level—one suggestion is to create a subdirectory for each exercise (e.g., \erdas_data\exer01\) and then download the corresponding exercise data into that subdirectory. Note: You will go through a