Much of the image data collected by earth-observing satellites is made available to the public free of charge.  Some data are available as GIF or JPEG images to be viewed in a web browser, while other data are in scientific data formats such as HDF and require special software to view.

Image and Data Sources
Data Format Descriptions
Getting and Using  Earth Imagery
On Developing Software

Many open-source libraries are available to help developers with geographic data manipulation, plotting, and conversion.  The technical notes on this page are useful for developers who want to create their own satellite data processing software.


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Processing and Viewing Software
Software Libraries For Developers
Technical Notes For Developers