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GLIDER

GLIDER. http://miningsolutions.itsc.uah.edu/glider/. Installing GLIDER. Using Instructions on GLIDER web page install GLIDER and create a short cut on your desk top Go here : C:Documents and SettingssundarDesktopGLIDER-3.0GliderWin32_v3.0b and create a subdirectory called data

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GLIDER

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  1. GLIDER http://miningsolutions.itsc.uah.edu/glider/

  2. Installing GLIDER • Using Instructions on GLIDER web page install GLIDER and create a short cut on your desk top • Go here : C:\Documents and Settings\sundar\Desktop\GLIDER-3.0\GliderWin32_v3.0b and create a subdirectory called data • Download MODIS Level 1 data files under data directory

  3. Importing File in GLIDER • Under Default Project > Right Click > Import > file System > Browse and select the HDF file that you placed in the GLIDER data directory. • Note that when selecting the file you must make sure that the check box is marked

  4. Import • Once you’ve imported the MODIS level 1B file you should see the file in your Default Project. • Right click on the hdf file and select Covert to gld file. You get a window that says operation in progress. This takes a few seconds/minutes depending upon your computer. • Once this is complete you should see the .gld file right below the hdf file in the Default Project in the main GLIDER window. • You are now ready to explore GLIDER functionalities

  5. Display Image • Right Click on the gld file and select open image view. You should now see your image • Click on Display > Channel Editor and you should see this

  6. RGB Display • You can now pick any combination for RGB and display image in color composites • Try Red : 0.645um, Mark Equalize, Green : 0.858 um Equalize, Blue : 11.03 um, mark Equalize and Flip • Equalize is a image enhancement technique called histogram equalization and flip inverts the infrared channel to make clouds look brighter than the surface. • See next page for what your enhanced RGB image should look like

  7. RGB

  8. 2D scatter plot • Try Tools > Image Analysis > 2D scatter plot > Region of interest and select a small box over the smoke plume in yellow • You should see scatter plot in Gray scale for the 3 different band combinations. • 2D scatter plots allows one to examine the spectral response of the various classes.

  9. Spectral Profiles • Try Tools > Image Analysis> Profile > Spectral • You can examine the spectral features in reflectance or temperature scale for any point that you pick. Pick a point on the smoke aerosol plume.

  10. Other features • While this exercise has focused mainly on Image Display GLIDER has many other features. Click on Window > Earth View and you should be able to look at the RGB image in Google Earth type format with several layers • See next page for the image

  11. Earth View Display

  12. Other GLIDER features • GLIDER is a comprehensive tool for image analysis, classification and data mining. • Explore the various aspects of GLIDER • More importantly, it’s free! • http://miningsolutions.itsc.uah.edu/glider/

  13. Volcanic Ash • R:0.645 um, G : 0.858um, B : 0.469 um (All channels equalized)

  14. Volcanic Ash • R:0.645 um, G : 0.858um, B : 11.03 um (All channels equalized, B channel also flipped)

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