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Welcome to the Geohashing Wiki. Geohashing was brought to you by the xkcd webcomic. Read this information in Flag of Germany.png Deutsch - Flag of Spain.png Flag of Mexico.png Flag of Chile.png Español - Flag of France.png Français - 800px-Flag of Sweden.png Svenska - and maybe other languages.

Okay, if you don't hear back from me in two hours, call the police and tell them to look for me approximately at the 50 10 geohash of the day.
find some more great geohashing quotations here.
Mampfred on the phone with his wife after dark at 2010-10-18_50_10

What is this?

The Algorithm as shown in xkcd comic #426, published on 21 May 2008.

Geohashing is an adventure, comprising journeys to random places within a given area. Every day, effectively random locations are generated by an algorithm that achieves randomness using stock market data. It is a Spontaneous Adventure Generator. A set of coordinates is generated for each 1°×1° latitude/longitude zone (known as a graticule) in the world. The coordinates can lie anywhere in the graticule — in the forest, in a city, on a mountain, or even in the middle of a lake! Everyone in a given region gets the same set of coordinates relative to their graticule.

The generated coordinates are used as destinations for adventures, à la Geocaching, or for local meetups. After the fun, please document your expedition! The rest of us would love to read your story, see your photos, and cheer your success (or commiserate with your failure). You can use this wiki to document the daily coordinates (geohashes) you’ve been to or tried to reach.

Learn more Get involved


news archive What's new on the wiki More pages needing discussion --- Discussion archive Now discussing - please join in: 
  • A proposal to identify users who are willing to be advocates/mentors for geohashing.
  • We are almost always discussing in the Geohashing IRC channel: Join us in #geohashing on irc.foonetic.net

Official xkcd meetups

Rhonda, Robyn and Wade at the 25 April 2009 coordinates for Vancouver, BC, Canada

Official xkcd meetups happen every Saturday afternoon at 4:00 p.m.(*) at that day’s normal geohash coordinates. It is considered a Saturday meetup if you are there at 4:00 p.m. or if you meet people, but you are most likely to encounter other readers of xkcd if you go at the designated time. Bring games!

You're encouraged to geohash on any day of the week that the coordinates are accessible to you, but if you attempt one meetup all week, make a little extra effort to have it be on Saturday. All meetups start at 4:00 p.m. or as designated on the graticule page.

There's even an achievement for making it to 100 Saturday meetups.

*In some areas, 4:00pm is too close to sunset during the winter, so earlier meetups are often more appropriate. See individual graticule pages for local conventions.


Recent and Upcoming Coordinates

The coordinates for the next Saturday meetups, scheduled for 20 September 2014, will be based on the Dow’s opening price published at 09:30 EDT (13:30 UTC) on Friday 19 September. See timeanddate.com to convert this time to your local time zone.

Disclaimer: When any coordinates generated by the Geohashing algorithm fall within a dangerous area, are inaccessible, or would require illegal trespass, DO NOT attempt to reach them. Please research each potential location before attempting to access it. You are expected to use proper judgment in all cases and are solely responsible for your own actions. See more guidelines.

Gallery of Recent Expeditions

The gallery for each day is added to this page automatically, but pictures are selected to the gallery by us. Any geohasher is welcome to add a picture from that day. Just add your image name in the list at the “add yours” link. If the gallery hasn't been started yet, copy the format from the previous day, or read the how-to. Please also write an account of your expedition, even if only a short one, so that people can click the link on your picture and find out more.

Click here to learn how to add your own expedition pictures.

If your newly added expedition does not show, click here to refresh the cache

Click here to see an automatic list of all recent expeditions, whether pictures were posted or not.

Recent Expeditions

Recent non-expeditions

This section documents hash expeditions that geohashers wish they could make, but have not been able to for the reasons stated.

2014

2013

Previous