Metro Vancouver

• Abbotsford Maps
• Burnaby Map
• Coquitlam City Maps
• Langley Maps | City | Township
• Maple Ridge Maps
• Mission WebMap
• New Westminster Maps
• North Vancouver GeoWeb
• Port Moody Maps
• Richmond Maps & GIS
• Surrey Maps
• VanMap
• ​West Vancouver Maps

British Columbia

• BC Economics Atlas
• BC Geological Survey by the Ministry of Energy and Mines
• Community Mapping Network - has community-based atlases with customized data entry and reporting tools
• DataBC Geographic Data and Services 
• GeoBC Topographic Maps of BC

Canada

• The Atlas of Canada by Natural Resources Canada
• McGill University Library Map Collection (22,000 Canadian maps hosted on Canadiana)
• Open Maps (Government of Canada)

United States

• David Rumsey Map Collection (16th to 21st centuries)
• The Dynamic Topographic Maps Illustrating Physical Features by USGS
• Library of Congress Historical Map Collection
• The National Map by USGS

World

• The Age of Megacities: A Story Map

Produced by ESRI, this site shows population density maps of ten major world cities at different points in time.

• The World Factbook 

Produced by Central Intelligence Agency. This resource includes a section on regional and country maps around the world.

• United Nations ReliefWeb

Produced by the United Nations, this site offers maps and information on disasters and humanitarian efforts.

• Global Soil Biodiversity Atlas (free download)

Out of this world

• USGS Geologic Atlas of the Moon by United States Geological Survey
• NASA Mars Trek NASA's web-based interactive map of Mars, featuring data gathered from all the landing sites.