Before starting to create charts or maps, get to know your data.
- Where did it come from?
- Who compiled the data, and for what purpose?
- What do the data labels really mean?
- Ask yourself: Am I working with the most recent version, in the best available format?
Closely examine your data files to understand their meaning, sources of origin, and limitations. TO DO expand on this theme with examples of bad and misleading data
TO DO cite and explain this resource https://github.com/Quartz/bad-data-guide