Sources des dates 

geospatioal.org

l'agence nationale de cadastre et de publicite immobilliere

Global Land Over Facility

geodata.gov

Soviet Military Maps

EUROSTAT Gisco

Open Street Map

NASA Visible Earth 

NOAA's National Geophysical Data Center

NASA Earth Observatory

University of California, Berkely

NOAA's National Geophysical Data Center 

NOAA's National Geophysical Data Center

ESRI

Global Mapper