The import function in the free open source SAGA-GIS software makes viewing Landsat data on your own desktop a simple one step process. There is no other tool, free or commercial providing an easier way to import and visualise Landsat data.
The SAGA tool combines three separate functions into one easy dialog box.
- Re-projecting: Landsat data is by default in a UTM North coordinate system which is problematic for southern hemisphere scenes and people who need their data in a geographic (lat/Long) projection. The Landsat import tool allows you to select the scenes UTM hemisphere or geographic coordinate system
- RGB composite display: The import tool allows you directly choose a red, green, blue band combination to display direct on import.
- Contrast enhancing: On import the band combination of choice will automatically appear in the map display window with a histogram stretch applied to produce a scene that is immediately useable. In addition to this SAGA provides a way to enhance the image display on-the-fly based on the current displayed map window allowing the rapid stretching of image data to show the most detail in your area of interest.