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Welcome to the Geohashing Community Wiki. Geohashing is a method for finding a random location nearby and visiting it, i.e. a Spontaneous Adventure Generator. Geohashing was brought to you to you by the xkcd webcomic.
What is this?
xkcd comic #426, published on 21 May 2008, contains an algorithm that generates random coordinates around the world every day.
Every day, the algorithm generates a new set of coordinates for each 1°×1° latitude/longitude zone (known as a graticule) in the world. They are randomly placed -- they could be 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.
As such, these coordinates can be used as destinations for adventures, à la Geocaching, or for local meetups. After the fun, why not 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.
Play with the coordinate calculator at http://xkcd.com/geohashing. All coordinates refer to the WGS84 datum.
For more information, see how it works or the frequently asked questions. Also consider joining the #geohashing IRC channel on Foonetic.
Official xkcd meetups
Based on the title text from the comic that established geohashing, the "official" meetup day was interpreted as being Saturday; that is, the day one would have the best chance of meeting others -- see also Mouseover Day. Additionally it was decided through convention that a good meeting time would be 16:00 local time (4:00 P.M.)¹
However, neither of these are hard rules, and they were formulated at a very different early stage in the sport's history. Nowadays and for quite awhile actually, any date or time can be good (or bad, depending on how many other hashers are near you) for meeting up, especially if prearranged. Note that this only applies to that day’s normal local geohash or globalhash coordinates, if you try to go to an alternate location without telling anyone else, it's highly unlikely you'd meet up with a hasher there (obviously).
¹Or earlier if that would be too close to sunset during the winter, or other quirks of temporal tradition; see your local graticule page for consensus there.
Recent and Upcoming Coordinates
The coordinates for the Saturday meetups on 30 November 2024 are now available. The coordinates for the next Saturday meetups, scheduled for 7 December 2024, will be based on the Dow's opening price published at 09:30 EST (14:30 UTC) on Friday 6 December. See timeanddate.com to convert this time to your local time zone.
- Coordinates: Mon 2 Dec* | Sun 1 Dec | Sat 30 Nov | Fri 29 Nov | Thu 28 Nov | Wed 27 Nov | Tue 26 Nov | Mon 25 Nov
* Only known for regions east of 30W longitude. Coordinates for regions to the west announced 14:30 UTC, 2 December. - View expedition archives for: November 2024 | October 2024 | September 2024 | More...
- Refresh the cache
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.
