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Great Lines of Earth
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Managed By: Icon Here Parallel waymarkers
The Great Lines of earth category is for markers, plaques, signs or other man-made objects like statues, monuments, etc., that indicate any of the following: the five major circles of latitudes, equal degree of latitudes (parallells), equal degree of longitude (meridians), or historical meridians.
Expanded Description:

Waymarks in this category present one of the great lines listed below!

A. Major circles of latitude:
1. Arctic Circle (66° 33' 39'' N)
2. Tropic of Cancer (23° 26' 22'' N)
3. Equator (0° latitude)
4. Tropic of Capricorn (23° 26' 22'' S)
5. Antarctic Circle (66° 33' 39'' S)

B. Equal degree of latitude:
For example 45 degrees.
Some others are mentioned in Wikipedia site of circles of latitudes.

C. Equal degree of longitudes, except Greenwich / Prime meridian that already has its own category.

D. Historical Meridians:
See Wikipedia site of historical meridians

Here are some examples of great lines of earth markers:

Image from Wikipedia (180 th meridian marker in Taveuni, Fiji)

Image from wikipedia (Tropic of cancer monument in northeast of Villa de Cos, Zacatecas, Mexico.)

Instructions for Posting a Great Lines of Earth Waymark:

There must be some kind of man-made object, marker, sign or plaque that marks the great line in question. It doesn't need to to have any written coordinates. Plain text is enough as long as there is something that proves the object is placed to indicate one of the great lines of Earth.

Name your waymark using following format.
[name of degree of latitude, longitude, major circle or historical meridian] [What kind of object] - [City, Country].
For example. Arctic Circle sign - Rovaniemi, Finland

Measure accurately the waymark's location with your GPSr. These are waymarks coordinates!

(Added 24.8.2009)Each marker can only be waymarked once in this category. So if there is a marker that have coordinates in equal degree of latitude and longitude meaning it is Confluence point. That would one waymark in this category.

Tolerance: Give the distance and direction between your GPSr reading of the location and the actual location of the great line that your waymark represents.

Tell us what is written on object about the great line that you have waymarked.

At least TWO photos are required. One should be a clear close-up of the marker or object, and one must be a wide view showing the marker or object in its surroundings. Photos showing yourself, your group, or your GPSr are also welcomed, but optional.

Instructions for Visiting a Waymark in this Category:
Post a picture of the object and tell something about your visit at site.
Category Settings:
  • Waymarks can be added to this category
  • New waymarks of this category are reviewed by the category group prior to being published
  • Category is visible in the directory
  • Line type
  • If other type, please explain.
  • Tolerance
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Image for Mount Diablo Meridian and Base Line - Mt Diablo, Californiaview gallery

SESE56.8 km

Log it!

Great Lines of EarthMount Diablo Meridian and Base Line - Mt Diablo, California

in Great Lines of Earth

This is the location of the Mount Diablo Meridian and Base Line for the PLSS within Northern California and Nevada.

posted by: Groundspeak Premium Member DougK

location: California

date approved: 9/6/2016

last visited: never

Premium Member Downloads: download.GPX Lite File       download.LOC File       download .KML File (Google Earth)