🏛️ National Geographic Society
The leading professional organization for this field — research and educational resources.
nationalgeographic.org →USGS National Map
US Geological Survey topographic maps and geographic data for the entire US.
usgs.gov →CIA World Factbook
Comprehensive country profiles with geography, government and economic data.
cia.gov →AAG — Association of American Geographers
Professional organization advancing geography education and research.
aag.org →UN Geographic Information
United Nations geographic data, maps and global statistics.
unstats.un.org →GeoNames
Free geographical database covering all countries with over 11 million place names.
geonames.org →