Maps
Maps that matter
Strange Maps
Worldmapper
Geography, GIS and Cartography
Royal Geographical Society
The British Cartographic Society
Society of Cartographers
Free GIS Data (extensive overview of online resources)
Global Administrative Database
Link collection of the Map Department at Cambridge University
Data, Visualisation & Data Visualisation
Vis4 blog by Gregor Aisch
Moritz Stefaner
Visualising Data by Andy Kirk
Datavisualisation by Interactive things (Switzerland)
Guardian Datastore
European Union Open Data Portal
Govdata Portal Germany
UK Open Data Portal
USA Data Portal
World Bank Data
London Datastore
NYC Open Data
Some Blogs worth reading
Carto Nerd by Ken Field
Data Science in Place by Andrea Ballatore
Everything is connected to everything else by Carl Lee
Living Geography by Alan Parkinson
Mapping London
There is nothing like travelling by Tina Gotthardt
Spatial Analysis by James Cheshire
Stats, Maps n Pix by Alasdair Rae
Suprageography by Ollie O’Brien