==See also==*1st meridian east*1st meridian west* Maps in Wikimedia Commons by prime meridian==Footnotes====References====External links==* "Where the Earth's surface begins—and ends", "Popular Mechanics", December 1930* scanned TIFFs of the conference proceedings* Prime meridians in use in the 1880s, by country* Canadian Prime Meridian
* "Where the Earth's surface begins—and ends", "Popular Mechanics", December 1930* scanned TIFFs of the conference proceedings* Prime meridians in use in the 1880s, by country* Canadian Prime Meridian