Linked from

The 41 pages that link to Longitude, each with the reason it gives.

• Treaty of TordesillasNarrower topic: The boundary depended on locating a line at a specified westward distance.

• MeridianNarrower topic: A meridian is one line in the coordinate system that longitude measures.

• Prime meridianNarrower topic: The prime meridian supplies the zero point for measuring it.

• Lunar distance methodNarrower topic: The method’s final result is the observer’s longitude from a time difference.

• Treaty of ZaragozaNarrower topic: Determining longitude at sea was difficult, making the treaty’s global boundary hard to locate precisely.

• Nevil MaskelyneNarrower topic: Solving longitude at sea was the practical problem that shaped Maskelyne's work.

• 180th meridianNarrower topic: The 180th meridian is one line of constant longitude.

• Eastern HemisphereNarrower topic: Longitude determines which side of the prime meridian a place occupies.

• Hemispheres of EarthNarrower topic: Longitude locates places relative to the meridians used for the east–west division.