Main Page

From Geo Hashing

Welcome to the Geohashing Wiki. Geohashing was brought to you by the xkcd webcomic.

“	Hi, mom! - Are you at home? - No. - Where are you? - Um, near Garmisch... - Are you geohashing again? - Um, yes... - How many of you are there? - Nine... - Well, have fun, but don't tell your father. Bye.		”
find some more great geohashing quotations here.		—Danatar, on the phone at 2009-06-07 47 10

What is this?

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

Geohashing is a method for finding an effectively random location nearby and visiting it: a Spontaneous Adventure Generator. Every day, the algorithm generates a new set of coordinates for each 1°×1° latitude/longitude zone (known as a graticule) in the world. The coordinates can be anywhere -- 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.

As such, these coordinates can be 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 How it works Frequently asked questions Guidelines Hall of Amazingness	Get involved Find others in your local area Use a coordinate calculator to find a hash and meet others Join #geohashing chat on foonetic with your own IRC client or using your web browser. Create your user page and become a part of the community!

news archive What's new on the wiki 2009-11-07 Study the geohashing Narrative chart in svg or png format. 2009-10-22 Posted achievement and A Tale of Two Hashes achievement are accepted as new achievements. 2009-08-24 Add yourself to this list if you would like to order a geohashing calendar.	discussion archive Now discussing - please join in 2009-10-23 Is the Skate geohash achievement proposal the better ski geohash achievement? 2009-09-28 Are some of the gratuitous ribbons ready to become a real achievement? 2009-08-12 Should the Migration Geohash be based on number of people, or number of different graticules? Should it be split into two achievements?

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 Saturday meetups on 21 November 2009 are now available. The coordinates for the next Saturday meetups, scheduled for 28 November 2009, will be based on the Dow’s opening price published at 09:30 EST (14:30 UTC) on Friday 27 November. See timeanddate.com to convert this time to your local time zone.

Coordinates: Mon 23 Nov* | Sun 22 Nov | Sat 21 Nov | Fri 20 Nov | Thu 19 Nov | Wed 18 Nov | Tue 17 Nov | Mon 16 Nov
* Only known for regions east of 30W longitude. Coordinates for regions to the west announced 14:30 UTC, 23 November.
View expedition archives for: November 2009 | October 2009 | September 2009 | More...
Refresh the cache

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.

Photos from Friday 20 November 2009 (add yours)