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  1. Download as PDF Printable version In other projects Wikimedia Commons Languages On this Wikipedia the language links are at the top of the page across from the article title. Go to top. Contents move to sidebar (Top) 1 History 2 Latitude and longitude 3 Geodetic datum 4 Length of a degree 5 Alternate encodings 6 See also 7 Notes 8 References

    • Decimal Degrees

      Decimal degrees (DD) is a notation for expressing latitude...

  2. Download as PDF Page for printing In other projects Wikimedia Commons Languages On this Wikipedia the language links are at the top of the page across from the article title. Go to top. Toggle the table of contents Geographic coordinate system 167 languages Acèh Адыгэбзэ Afrikaans Alemannisch አማርኛ Аԥсшәа العربية Aragonés Arpetan অসমীয়া Asturianu

  3. A geographic coordinate system (GCS) uses a three-dimensional spherical surface to define locations on the earth. A GCS is often incorrectly called a datum, but a datum is only one part of a GCS. A GCS includes an angular unit of measure, a prime meridian, and a datum (based on a spheroid ). A point is referenced by its longitude and latitude ...

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    How to create a custom geographic coordinate system?

    What are geographic coordinate systems?

    What is coordinate system in geography?

    How did the geographic coordinate system originate?

    • from Maps
    • from Directories/Databases
    • from Other Sources

    From printed maps

    Looking at a printed map or atlas, either those you own or at a library.

    For the US

    1. The United States Geological Survey's public domain Geographical Names Information Service database serviceis extremely extensive, although riddled with errors. It also provides linkouts to topozone and terraserver so that you can tweak the results to your liking. Most of these coordinates use 2. US Census TIGER 3. US Census Boundary and Annexation Survey 4. Find Longitude and Latitude coordinates by US Zip Code 5. Search engine for GPS coordinates of latitude and longitude of the United S...

    For other regions

    1. For placenames in Antarctica, try Geographic Names Information System, Antarctica 2. For placenames in Australia, try Geoscience Australia Place Name Search 3. For placenames in Canada, try the Canadian Geographical Names Data Base (CGNDB) Querying Canadian Geographical Names 4. For placenames in the UK, is very useful for clicking on a precise point to show the coordinates. Near the foot of a page displaying a map is a link "Click here to convert/measure coordinates" which...

    Using a GPS receiverwith a clear view of the sky.
    Looking for "Waypoint" files on sites for GPS users, e.g.
    Googling for a city name together with "latitude", "longitude" will usually yield a plethora of useful results (example)
  5. Geographic coordinate system - Wikipedia - Read online for free.

  6. A geographic coordinate system. The lines that run east and west each have a constant latitude value and are called parallels. They are equidistant and parallel to one another, and form concentric circles around the earth. The equator is the largest circle and divides the earth in half. It is equal in distance from each of the poles, and the ...

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