1. Log in to Github
2. Open the file you want to change, for example settlements.civmap.json
3. On the top right, click the edit pen
4. Make your changes
5. Check for JSON formatting errors: paste everything into JSONLint
6. At the bottom, click Propose file change
7. Once the page loads, click Create Pull Request

Thank you for contributing to CCMap!

Download the spreadsheet in Tab-separated Values format (.tsv) and run this command:

cat "CivClassic Settlements - Settlements (1).tsv" | python3 scripts/overlay_from_tsv.py 'omit=founded=major=active=Activity Index - Jan. 2018=Activity Index - Feb. 2018=Activity Index - Apr. 2018=Activity Index - May 2018=Appomattox Builder\'s Association - Rating' | sed -E 's/\}, \{/\},\n    \{/g' > settlements.civmap.json

The omit=... argument removes these spreadsheet columns from the output.

The sed -E 's/\}, \{/\},\n \{/g' splits the file into many lines, to make viewing diffs easier.