Kép:ShrinkingLakeChad-1973-1997-EO.jpg

en:

• Description: A composite of images showing the diminishing en:Lake Chad from 1973 to 2001.
• Info: The large image is a composite of photos taken with en:Landsat-7. Images courtesy NASA GSFC Scientific Visualization Studio and Landsat 7 Project Science Office.
• Source: earth observatory (file)
• License: Public domain [1]

de:

• Beschreibung: Der de:Tschadsee schrumpft langfristig. Das Bild zeigt den See im Jahr 1973, 1978, 1997 und 2001 aus der Erdumlaufbahn. Die offene Wasserfläche ist im Falschfarbeninfrarotbild blaugrün wiedergegeben.
• Quelle: Adapted from NASA images at http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=4714 (aus der englischen Wikipedia)
• Lizenzstatus: Public Domain

[edit] License

This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA copyright policy page or JPL Image Use Policy). Warnings: Use of NASA logos (which include the current "meatball" logo, the old "worm" logo, and the seal) is restricted. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not in the public domain. Materials from the Hubble Space Telescope may be copyrighted if they do not explicitly come from the STScI. [2] All materials created by the SOHO probe are copyrighted and require permission for commercial non-educational use. [3] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [4]