Blue Marble Next Generation (500 m / pixel)
 
    NASA Goddard Space Flight Center Earth Observatory  http://earthobservatory.nasa.gov/Newsroom/BlueMarble/
  
    Earth's City Lights
    Data courtesy Marc Imhoff of NASA GSFC and Christopher Elvidge of NOAA NGDC. Image by Craig Mayhew and Robert Simmon, NASA GSFC.
  
    Shuttle Radar Topography Mission (SRTM30, 1 km / pixel )
 
    NASA Jet Propulsion Laboratory http://www2.jpl.nasa.gov/srtm/
  
    Micro World Data Bank in Polygons ("MWDB-POLY / MWDBII")
    CIA ; Global Associates, Ltd.; Fred Pospeschil and Antonio Rivera
  
    Temperature and Precipitation Maps (July and December)
 
    A combination of two datasets:
    
    OpenStreetMap
    The street maps used in Marble via download are provided by the OpenStreetMap Project ("OSM"). OSM is an open community which creates free editable maps.
    License: OpenStreetMap data can be used freely under the terms of the Creative Commons Attribution-ShareAlike 2.0 license.
  
    OpenStreetMap
    The routes used in Marble via download are provided by the OpenRouteService Project ("ORS").
    License: OpenRouteService data can be used freely under the terms of the Creative Commons Attribution-ShareAlike 2.0 license.
  
    World Gazetteer
 
    Stefan Helders http://www.world-gazetteer.com
  
    Geonames.org
 
    http://www.geonames.org/
    License: Geonames.org data can be used freely under the terms of the Creative Commons Attribution 3.0 license.
  
    Czech Statistical Office
 
    Public database http://www.czso.cz
  
    Flags of the World
    The flags were taken from Wikipedia (http://www.wikipedia.org) which in turn took a subset from http://www.openclipart.org and reworked them. All flags are under the public domain (see comments inside the svg files). 
  
    The Bright Star Catalogue
    5th Revised Ed. (Preliminary Version)
     Hoffleit D., Warren Jr W.H.,
    Astronomical Data Center, NSSDC/ADC (1991) 
    http://adc.gsfc.nasa.gov