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GLIDER - PowerPoint PPT Presentation

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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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installing 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 Settings\sundar\Desktop\GLIDER-3.0\GliderWin32_v3.0b and create a subdirectory called data
  • Download MODIS Level 1 data files under data directory
importing file in glider
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
  • 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
display image
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
rgb display
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
2d scatter plot
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.
spectral profiles
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.
other features
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
other glider features
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!
volcanic ash
Volcanic Ash
  • R:0.645 um, G : 0.858um, B : 0.469 um (All channels equalized)
volcanic ash1
Volcanic Ash
  • R:0.645 um, G : 0.858um, B : 11.03 um (All channels equalized, B channel also flipped)