Some MultiSpec Tutorials/Exercises

The following are some small tutorials or exercises that one can follow to gain some experience using MultiSpec. These tutorials will illustrate how to display multispectral and thematic images, run unsupervised classification (ISODATA), run supervised classifications view the results, learn how to combine separate image files into one image file, overlay shape files onto images, enhance images and work with the coordinate view. There is a separate pdf document for each tutorial.

The documents are in Adobe Acrobat Format and can be read within your web viewer if you are using version 3 or later of Netscape Navigator and version 4 or later of Acrobat Reader. An Acrobat Reader for Macintosh, Windows, or Unix can be downloaded from "http://www.adobe.com/prodindex/acrobat/readstep.html".

Tutorials/Exercises

  1. Display and Inspection of Image Data with MultiSpec
    In this exercise, you will display an aircraft image file and view the data in several ways using MultiSpec.
  2. Image Enhancement
    This exercise illustrates how you can control the enhancement of the image in the multispectral image window by setting five different options in the Enhancement portion of the Display Specifications dialog box.
  3. Unsupervised Classification (Cluster Analysis)
    Two Clustering algorithms are available in MultiSpec. They are useful in grouping similar pixels in the image into clusters or categories. One algorithm implemented is a simple one-pass type. The second is an iterative type called ISODATA. You will use the ISODATA algorithm for this exercise.
  4. Supervised Classification
    You can also do a supervised classification of an image file by selecting training areas for selected classes from known areas.
  5. Combining Separate Image Files into a Single Multispectral Image File
    One can use the "Logically Linking" capability in MultiSpec to link several image files together to be treated as one image file in an image window and/or create a new image file that incorporates all of the separate images. For example many times one will receive Landsat images from the EROS Data Center on a CD or DVD that contains one file for each of the 7 bands. This exercise will illustrate how to do this. (A sample set of individual bands can be downloaded or you can provide your own set of files.)
  6. Overlay Shape Files on Image Window
    This exercise will illustrate how to open ArcView Shape files and overlay them onto an image.
  7. Selecting Areas and the Coordinate View
    One can make selections of areas within an image using line-column units, map units or latitude-longitude units. The map and latitude-longitude units are only available for images where the required map projection information is available. This exercise will illustrate how this works.

Tutorial/Exercise Image Files

Image file used for exercises 1, 2, 3 and 4 (ag020522_DPAC_cd.lan).

Image file and shape files used for exercise 5 (L7_000606_Indy band files).

Image file and shape files used for exercise 6 (L7_000606_Indy.tif).

Image files used for exercise 7 (three pampas files).

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Updated: March 20, 2006