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            This is a file from the  Wikimedia Commons. Information from its  description page there is shown below.  Commons is a freely licensed media file repository.  You can help. 
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        Summary 
        
         
          
           | Description | 
           
             English: These images show the Yangtze River in the vicinity of the Three Gorges Dam (lower right). Landsat 7 acquired the top image on November 7, 2006, after the main wall was complete. Landsat 5 acquired the bottom image on April 17, 1987. The lower image has been recolored to more closely match the colors of the upper one. 
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           | Date | 
           29 September 2007 (first version); 15 October 2007 (last version) | 
          
          
           | Source | 
           Transferred from  en.wikipedia; transferred to Commons by  User:Rehman using  CommonsHelper. | 
          
          
           | Author | 
           Original uploader was  Sagredo at  en.wikipedia. Later version(s) were uploaded by  Ilmari Karonen,  Rugby471 at  en.wikipedia. | 
          
          
           Permission ( Reusing this file) | 
           
             PD-USGOV; PD-RETOUCHED-USER. 
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         Licensing 
        
         
          | Public domainPublic domainfalsefalse | 
         
        
        
         
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          This work is in the  public domain in the United States because it is a  work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the  US Code. See  Copyright. Note: This only applies to original works of the Federal Government and not to the work of any individual  U.S. state,  territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the  United States Postal Service  since 1978. (See  206.02(b) of Compendium II: Copyright Office Practices). It also does not apply to certain US coins; see  The US Mint Terms of Use. 
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            This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.
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          | Public domainPublic domainfalsefalse | 
         
        
        
         
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          This work is based on a work in the  public domain. It has been digitally enhanced and/or modified. This derivative work has been (or is hereby) released into the  public domain by its author,  Ilmari Karonen. This applies worldwide. 
           In some countries this may not be legally possible; if so:  Ilmari Karonen grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. 
            
           
            
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       File usage
       
        The following pages on Schools Wikipedia link to this image (list may be incomplete):
        
        
       
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