GLIDER
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Transcript of GLIDER
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GLIDER
http://miningsolutions.itsc.uah.edu/glider/
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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
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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
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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
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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
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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
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RGB
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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.
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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.
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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
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Earth View Display
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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/
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Volcanic Ash
• R:0.645 um, G : 0.858um, B : 0.469 um (All channels equalized)
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Volcanic Ash
• R:0.645 um, G : 0.858um, B : 11.03 um (All channels equalized, B channel also flipped)