| Associated with 国際子午線会議 |
| Associated with 万国測地会議 |
| Disassociated from 万国測地会議 |
| Associated with 本初子午線及び計時万国公会 |
| Associated with 本初子午線并計時法万国公会 |
| Associated with International Meridian Conference |
| Associated with 万国子午線会議 |
| Associated with 萬國普通子午線及計時法公會 |
| Associated with 万国普通本初子午線会議 |
| Associated with 萬國普通本初子午線會議 |
| Associated with バンコク子午線会議 |