Blue Marble for SimGear Paged Terrain

Textures/Globe/00README.txt

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+ Image Use Policy
+
+Most materials published on the Earth Observatory, including images,
+are freely available for re-publication or re-use, including commercial
+purposes, with the following exceptions:
+
+    * where copyright is indicated, you must obtain the copyright
+      holder’s permission; we usually provide links to the organization
+      that holds the copyright,
+    * images from the SeaWiFS sensor older than five years are in the
+      public domain and can be re-used or re-published for any purpose. 
+      Images less than five years old can be re-used only for
+      educational or scientific purposes; any commercial use of such
+      images must be coordinated with GeoEye.
+
+We ask that NASA’s Earth Observatory be given credit for its original
+materials; the only mandatory credit is NASA.
+
+Source:
+
+  http://earthobservatory.nasa.gov/ImageUse/