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[[Image:Coordinates.png|thumb|301 px|The Algorithm]]
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__NOTOC__
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= The Adventure Starts Here =
  
[[Image:Portland Sample Coord.png|thumb|222 px|Coordinates for Portland on January 1, 2008 (taken from [http://xkcd.com/geohashing this tool])]]
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'''[[Geohashing]] is a global game of spontaneous adventure generation with over 17,000 expeditions since 2008.''' You will explore random locations, meet fellow geohashers, brave the elements, unlock [[Achievements|achievements]], and then come back here to '''[[expedition|document your expedition]]'''.
  
[[Image:Noterminal portland sample_2.jpg|thumb|222 px|[[User:NoTerminal|NoTerminal]] and [[User:Drache|Drache]] at the February 17th coordinates]]
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[[Image:Flag of Catalonia.png|15px]] [[Pàgina Principal|Català]] - [[Image:Flag of Germany.png|15px]] [[Hauptseite|Deutsch]] - [[Image:Flag of Spain.png|15px]] [[Image:Flag of Mexico.png|15px]] [[Image:Flag of Chile.png|15px]] [[Página Principal|Español]] - [[Image:Flag_of_France.png|15px]] [[Accueil|Français]] - [[Image:Flag of Italy.png|15px]] [[Pagina Principale|Italiano]] - [[File:Flag of Poland.png|15px]] [[Strona główna|Polski]] - [[Image:800px-Flag of Sweden.png|15px]] [[Huvudsida|Svenska]] - [[geohashing:translation|other languages]].{{QUOTER}}
  
== What is this? ==
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[[Image:Coordinates.png|thumb|400px|[[The Algorithm]] was invented for [[xkcd]] [http://www.xkcd.com/426/ comic #426], published on 21 May 2008.]]
  
[http://www.xkcd.com/426/ XKCD comic #426] contains an algorithm that generates random coordinates across the country<sup>1</sup> every day.
+
== How to play? ==
  
These coordinates can be used as destinations for adventures, ''à la'' [http://en.wikipedia.org/wiki/Geocaching Geocaching].  They can also be used for local meetups.
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# Get '''[https://geohashing.info/ today's coordinates]''' with a [[Geohashing:Coordinate_calculators|coordinate calculator]]
 +
# '''[[A beginner's guide|Go there]]''' (or as close as you safely and legally can)
 +
# '''[[Special:UserLogin|Create an account]]''' <small>(Returning after a break? All accounts created before 2020-02-02 [[Dark Ages|were deleted]]; you'll need to sign up again)</small>
 +
# '''[[Expedition|Write about]]''' your expedition!
  
For a little more interactive discussion consider joining [irc://irc.foonetic.net/geohashing the #geohashing IRC channel] on Foonetic.
+
== How does Geohashing work? ==
 +
Everyday, an [[algorithm]] generates a random coordinate from stock market data. That coordinate can be applied to every 1°×1° latitude/longitude ''[[graticule]]'' in the world, giving a point that might be in a field, a forest, a city, or even [[Water Geohash|out at sea]]! Everyone in the world gets the same set of coordinates relative to their graticule.
  
<small><sup>1.</sup> Europe/Asia date handling still under discussion, see [[Talk:Main Page]].</small>
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Each day, people try to get their nearest generated coordinate, for an adventure, to discover somewhere new, or to meet up with other geohashers. Afterwards, you can '''[[expedition|document your expedition]]'''. The rest of us would love to read your story, see your photos, and cheer your success (or commiserate with your [[Achievements#Consolation_Prizes | failure]])! Join the other 'spot spotters', be out standing in your field and use this wiki to document the daily coordinates (geohashes) you’ve been to or tried to reach.
  
== How it works ==
+
Each day there is also a single [[globalhash]] somewhere on Earth: rare, valued and much harder to reach.
  
Play with the coordinate calculator here: [http://xkcd.com/geohashing http://xkcd.com/geohashing]
+
{{Getting started}}
  
Every day, the algorithm generates a new set of coordinates for every region.  They are randomly placed -- they could be in the forest, in a city, or on a mountain.  You can use this wiki to document the coordinates (geohashes) you've been to.
+
{{New on the wiki}}
  
Unless you can predict the stock market, you can't figure out what the coordinates will be ahead of time.  You can first calculate a weekday's coordinates at about 9:30 AM (Eastern), and on Friday morning you can calculate the coordinates for each day that weekend.
+
== Official xkcd meetups ==
 +
{{:Saturday meetup}}
  
If you go on Saturday afternoons, you might encounter other xkcd readers. Bring games!
+
== Gallery of recent expeditions ==
 +
Every expedition should have one photo in that day's gallery, selected manually. Please add yours with the "add" link. If that day's gallery hasn't been started yet, please start it.
  
When the coordinate falls somewhere dangerous or illegal to reach, use your judgment. If the coordinates are in an obviously unreachable place (e.g., ocean), the meetup is postponed until a better day.  Alternatively, rent a boat.
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* [[Template:Expedition Images2/How-to|How to add your own expedition photos.]]
 +
* [{{fullurl:{{FULLPAGENAME}}|action=purge}} Refresh the cache] (if your image doesn't show up)
  
== Official Meetup ==
 
  
The official xkcd meetups happen every Saturday afternoon at 4:00 PM (local destination time)If the coordinates for your area are in the ocean, a military base, or somewhere otherwise unreachable, that meetup is of course postponed.  Unless, of course, you own a boat, are a soldier at said military base, or are James Bond.  If you can, record who's there, take pictures, and post them here.
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<!-- AUTOMATED BY User:reletDirect comments/questions/complaints about the automation process or the new gallery format to his user talk, or visit [[Template:Recent Images2]] -->
 +
{{Recent Images2}}
  
== Implementation ==
+
== Recent and Upcoming Coordinates ==
 +
<!--
  
A sample interactive coordinate calculator can be found here: [http://irc.peeron.com/xkcd/map]
+
THIS SECTION HAS BEEN COMPLETELY AUTOMATED BY User:Tjtrumpet2323. LEAVE MESSAGES ON HIS TALK PAGE WITH CONCERNS.
A reference implementation is available here: [http://irc.peeron.com/xkcd/map/sample.pl.html view] [http://irc.peeron.com/xkcd/map/sample.pl download]
 
  
A python implementation:
+
-->{{Next Saturday}}
<pre>import md5, datetime, struct, urllib, re
 
date = datetime.date.today()
 
djia = urllib.urlopen(date.strftime("http://irc.peeron.com/xkcd/map/data/%Y/%m/%d")).read()
 
sum = md5.new("%s-%s" % (date, djia)).digest()
 
print struct.unpack(">Q", sum[0:8])[0] / (2.**64), struct.unpack(">Q", sum[8:16])[0] / (2.**64)</pre>
 
  
There is also a Python package [http://3rdengine.com/labs/geohash/ <code>xkcd.geohash</code>]  which is independent of the interactive coordinate calculator (but uses [http://finance.google.com/finance Google Finance] as well).
+
* {{Coordinates list}}
 +
* {{Expedition archive recent}}
 +
 
 +
{{disclaimer}}
  
Yet another implementation in Python is here as well. It does the same as the ones above but also gives "validation" information. Lets you know if the geohash location is under water and thus if its a valid place to go party :). I'll add more terrain recognition if people like it. A webservice to access it can be found [http://geohashing.electronicwar.net/cgi-bin/geohashing.py?date=2008-05-20&xloc=-2&yloc=50 JSON Web Service] and an application using the web service can be seen here [http://geohashing.electronicwar.net/ Application]. The code is over here [http://users.ecs.soton.ac.uk/ss06r/GeoHashing/cgi-bin/geohashing.py Source Code]
 
  
If you're looking to code your own utilities and need a source for the Dow Jones Industrial Index for a day, NuclearDog has set up a mySQL backed page to query the value that automatically updates hourly. Details on this service (and others) is available at [[Dow Jones Industrial Index]].
+
{{Recent expeditions}}
  
=== Atom feed ===
+
==Recent non-expeditions==
You can subscribe to a feed that will give you updates on a daily basis:
+
This section documents hash expeditions that geohashers ''wish'' they could make, but have not been able to for the reasons stated.
<pre>http://staticfree.info/geohash/atom/LAT,LON</pre>
 
  
For example, here's the [http://staticfree.info/geohash/atom/42,-71 Atom Geohash for Boston].
+
[[Recent_non-expeditions#2013|2013]] - [[Recent_non-expeditions#2014|2014]] - [[Recent_non-expeditions#2015|2015]] - [[Recent_non-expeditions#2017|2017]] - [[Recent_non-expeditions#2020|2020]]
  
Just put your coordinates in, subscribe and you'll be ready to go!
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<!--- Please... Add other heroic non-expeditions anywhere that is appropriate.--->
  
== Active Graticules ==
+
<!--  
 
+
###### !!! POSTED !!! NO TRESPASSING !!! ##################################
- Region/Graticule pages named "City Name, Country (or state)" where "City Name" is the most major (by population) urban center contained within it.
+
IF YOU ARE READING THIS (and were hoping to add your expedition picture to the gallery) YOU HAVE TAKEN A WRONG TURN. TRY CLICKING THE 'add' BUTTON NEXT TO THE DAY OF YOUR EXPEDITION IN THE GALLERY.
 
+
Click on the link "Click here to learn how to add your own expedition pictures." above the gallery for more information.
=== Asia ===
+
###### !!! POSTED !!! NO TRESPASSING !!! ##################################
West to East (and North to South):
+
//-->
 
+
{{#css:
[[Singapore, Singapore|1, 103 (Singapore, Singapore)]]
+
  #firstHeading { display: none }
 
+
}}
[[Beijing, China|39, 116 (Beijing, China)]]
 
 
 
=== Australasia ===
 
 
 
[[Perth, Australia|-32, 115 (Perth, Australia)]]
 
 
 
[[Darwin, Australia|-13, 130 (Darwin, Australia)]]
 
 
 
[[Adelaide, Australia|-35, 138 (Adelaide, Australia)]]
 
 
 
[[Melbourne, Australia|-38, 145 (Melbourne, Australia)]]
 
 
 
[[Hobart, Australia|-43, 147 (Hobart, Australia)]]
 
 
 
[[Canberra, Australia|-35, 149 (Canberra, Australia)]]
 
 
 
[[Sydney, Australia|-34, 151 (Sydney, Australia)]]
 
 
 
[[Brisbane, Australia|-28, 153 (Brisbane, Australia)]]
 
 
 
[[Dunedin, New Zealand| -46, 170 (Dunedin, New Zealand)]]
 
 
 
[[Christchurch, New Zealand|-44, 172 (Christchurch, New Zealand)]]
 
 
 
[[Wellington, New Zealand|-42, 174 (Wellington, New Zealand)]]
 
 
 
[[Hamilton, New Zealand|-38, 175 (Hamilton, New Zealand)]]
 
 
 
[[Auckland, New Zealand|-37, 174 (Auckland, New Zealand)]]
 
 
 
=== Europe ===
 
West to East (and North to South):
 
 
 
[[Reykjavik, Iceland|64, -21 (Reykjavik, Iceland)]]
 
 
 
[[Dublin, Ireland|53, -7 (Dublin, Ireland)]]
 
 
 
[[Glasgow, United Kingdom|55, -4 (Glasgow, United Kingdom)]]
 
 
 
[[Exeter, United Kingdom|50, -4 (Exeter, United Kingdom)]]
 
 
 
[[Edinburgh, United Kingdom|55, -3 (Edinburgh, United Kingdom)]]
 
 
 
[[Carlisle / Lancaster, United Kingdom|54, -3 (Carlisle / Lancaster, United Kingdom)]]
 
 
 
[[Bristol, United Kingdom|51, -3 (Bristol, United Kingdom)]]
 
 
 
[[Birmingham East / Leicester / Coventry, United Kingdom|52, -2 (Birmingham East / Leicester / Coventry, United Kingdom)]]
 
 
 
[[Swindon / Oxford, United Kingdom|51, -2 (Swindon / Oxford, United Kingdom)]]
 
 
 
[[Southampton / Portsmouth / Bournemouth / Isle of Wight, United Kingdom|50, -2 (Southampton / Portsmouth / Bournemouth / Isle of Wight, United Kingdom)]]
 
 
 
[[Middlesbrough, United Kingdom|54, -1 (Middlesbrough, United Kingdom)]]
 
 
 
[[Sheffield / Leeds / Bradford, United Kingdom|53, -1 (Sheffield / Leeds / Bradford, United Kingdom)]]
 
 
 
[[London West, United Kingdom|51, -1 (London West, United Kingdom)]]
 
 
 
[[Cambridge, United Kingdom|52, 0 (Cambridge, United Kingdom)]]
 
 
 
[[London East, United Kingdom|51, 0 (London East, United Kingdom)]]
 
 
 
[[Paris, France|48, 2 (Paris, France)]]
 
 
 
[[Barcelona, Catalonia|41, 2 (Barcelona, Catalonia)]]
 
 
 
[[Ghent, Belgium| 51, 3 (Ghent, Belgium)]]
 
 
 
[[Noord_West_Nederland| 52, 4 Noord-West Nederland (Den Haag, Leiden, Amsterdam, Haarlem, Alkmaar, Den Helder)]]
 
 
 
[[Zuid west Nederland / Antwerpen| 51, 4 (Rotterdam / Antwerpen, Nederland / Belgium)]]
 
 
 
[[Midden Nederland|52, 5 (Midden Nederland)]]
 
 
 
[[Eindhoven, Netherlands|51, 5 (Eindhoven, Nederland - plus wat België)]]
 
 
 
[[Dijon, France|47, 5 (Dijon, France)]]
 
 
 
[[Enschede|52, 6 (Enschede, Netherlands) ]]
 
 
 
[[Cologne, Germany|50, 6 (Cologne/Aachen/Eifel, Germany, plus Eastern Belgium, plus some tiny parts of the Netherlands and Luxembourg)]]
 
 
 
[[Lac Léman|46, 6 (Lac Léman region, includes Geneva and Lausanne, Switzerland and parts of Haute-Savoie, France)]]
 
 
 
[[Bremen, Germany|53, 8 (Bremen, Germany)]]
 
 
 
[[Genoa, Italy|44, 8 (Genoa, Italy)]]
 
 
 
[[Aalborg|57, 9 (Aalborg, Denmark) ]]
 
 
 
[[Trondheim|63, 10 (Trondheim, Norway) ]]
 
 
 
[[Oslo|59, 10 (Oslo, Norway)]]
 
 
 
[[Braunschweig, Germany|52, 10 (Braunschweig, Germany) ]]
 
 
 
[[Copenhagen|55, 12 (Copenhagen, Denmark)]]
 
 
 
[[Berlin, Germany|52, 13 (Berlin, Germany)]]
 
 
 
[[Stockholm, Sweden|59, 18 (Stockholm, Sweden)]]
 
 
 
[[Gliwice, Poland|50, 18 (Gliwice, Poland)]]
 
 
 
[[Helsinki, Finland|60, 24 (Helsinki, Finland)]]
 
 
 
[[St.Petersburg|60, 30 (St.Petersburg, Russia)]]
 
 
 
[[Kiev|50, 30 (Kiev, Ukraine)]]
 
 
 
[[Moscow|55, 37 (Moscow, Russia)]]
 
 
 
=== North America ===
 
West to East (and North to South):
 
 
 
[[Anchorage, Alaska|61, -150 (Anchorage, Alaska)]]
 
 
 
[[Vancouver, BC|49, -123 (Vancouver, BC)]]
 
 
 
[[Victoria, BC|48, -123 (Victoria, BC)]]
 
 
 
[[Surrey, BC|49, -122 (Surrey, BC)]]
 
 
 
[[Seattle, Washington|47, -122 (Seattle, WA)]]
 
 
 
[[Portland Graticule|45, -122 (Portland, OR)]]
 
 
 
[[San Francisco|37, -122 (San Francisco)]]
 
 
 
[[Chilliwack, BC|49, -121 (Chilliwack, BC)]]
 
 
 
[[Sacramento, California|38, -121 (Sacramento, CA)]]
 
 
 
[[San Diego, California|?, ? (San Diego, CA)]]
 
 
 
[[San Francisco: East Bay|37, -121 (San Francisco: East Bay, San Jose)]]
 
 
 
[[Spokane, Washington|47, -118 (Spokane, WA)]]
 
 
 
[[Los Angeles|34, -118 (Los Angeles, CA)]]
 
 
 
[[Boise, ID|43, -117 (Boise, ID)]]
 
 
 
[[San Bernardino|34, -117 (San Bernardino)]]
 
 
 
[[Santa Ana, CA|33, -117 (Santa Ana, CA)]]
 
 
 
[[Las Vegas, Nevada|36, -115 (Las Vegas, Nevada)]]
 
 
 
[[Edmonton, AB|53, -113 (Edmonton, AB)]]
 
 
 
[[Phoenix (West Valley), Arizona|33, -112 (Phoenix West Valley, AZ)]]
 
 
 
[[Salt Lake City, Utah| 40, -111 (Salt Lake City, Utah)]]
 
 
 
[[Phoenix (East Valley), Arizona| 33, -111 (Phoenix East Valley, AZ)]]
 
 
 
[[Tucson, Arizona| 32, -110 (Tucson, AZ)]]
 
 
 
[[Albuquerque/Santa Fe, New Mexico|35, -106 (Albuquerque/Santa Fe, New Mexico)]]
 
 
 
[[Prince Albert, Saskatchewan, Canada|53, -105 (Prince Albert, Saskatchewan, Canada)]]
 
 
 
[[Regina, Canada|50, -105 (Regina, Saskatchewan, Canada)]]
 
 
 
[[Denver, Colorado|40, -105 (Denver/Boulder, Colorado)]]
 
 
 
[[Santa Fe, New Mexico|35, -105 (Santa Fe, New Mexico)]]
 
 
 
[[Aguascalientes, México|21, -103 (Aguascalientes, México)]]
 
 
 
[[Monterrey Mexico|25, -100 (Monterrey, Mexico)]]
 
 
 
[[Winnipeg, MB|49, -97 (Winnipeg, Manitoba)]]
 
 
 
[[Oklahoma City, Oklahoma|35, -97 (Oklahoma City, Oklahoma)]]
 
 
 
[[Ft. Worth, Texas|32, -97 (Ft. Worth, Texas)]]
 
 
 
[[Austin, Texas|30, -97 (Austin, Texas)]]
 
 
 
[[San Antonio, Texas|29, -98 (San Antonio, Texas)]]
 
 
 
[[Omaha, Nebraska|41, -96/-95 (Omaha, Nebraska)]]
 
 
 
[[Lincoln, Nebraska|40, -96 (Lincoln, Nebraska)]]
 
 
 
[[Dallas, Texas|32, -96 (Dallas, Texas)]]
 
 
 
[[College Station, Texas|30, -96 (College Station, Texas)]]
 
 
 
[[Lawrence/Topeka, Kansas|39/38, -95 (Lawrence/Topeka, Kansas)]]
 
 
 
[[Tulsa, Oklahoma|35/36, -95/-96 (Tulsa, Oklahoma)]]
 
 
 
[[Houston, Texas|29, -95 (Houston, Texas)]]
 
 
 
[[Kansas City, Missouri|39, -94 (Kansas City, Missouri)]]
 
 
 
[[Minneapolis NW, Minnesota| 45, -93 (Minneapolis NW, Minnesota)]]
 
 
 
[[Minneapolis SW, Minnesota| 44, -93 (Minneapolis SW, Minnesota)]]
 
 
 
[[Des Moines, Iowa| 41, -93 (Des Moines, Iowa)]]
 
 
 
[[Lafayette, Louisiana|30, -92 (Lafayette, Louisiana)]]
 
 
 
[[St. Louis, Missouri| 38, -91 (St. Louis, Missouri)]]
 
 
 
[[Baton Rouge, Louisiana|30, -91 (Baton Rouge, Louisiana)]]
 
 
 
[[New Orleans, Louisiana|30/29, -90/-89 (New Orleans, Louisiana)]]
 
 
 
[[Chicago, Illinois| 41, -87 (Chicago, Illinois)]]
 
 
 
[[Milwaukee, Wisconsin| 43, -87 (Milwaukee, Wisconsin)]]
 
 
 
[[Champaign/Urbana, Illinois| 40, -88 (Champaign/Urbana, Illinois)]]
 
 
 
[[Bloomington, Indiana| 39, -86 (Bloomington, Indiana)]]
 
 
 
[[Nashville, Tennessee| 36, -86 (Nashville, Tennessee)]]
 
 
 
[[Huntsville, Alabama| 34, -86 (Huntsville, Alabama)]]
 
 
 
[[Grand Rapids, Michigan| 42, -85 (Grand Rapids, Michigan)]]
 
 
 
[[Chattanooga, Tennessee| 35, -85 (Chattanooga, Tennessee)]]
 
 
 
[[Cincinnati, Ohio| 39, -84 (Cincinnati, Ohio)]]
 
 
 
[[Atlanta, Georgia| 33, -84 (Atlanta, GA)]]
 
 
 
[[Ann Arbor|42, -83 (Ann Arbor, Michigan)]]
 
 
 
[[Detroit, Michigan|42, -83 (Detroit, MI)]]
 
 
 
[[Toledo, Ohio|41, -83 (Toledo, OH)]]
 
 
 
[[Tri-Cities, Tennessee|36, -83 (Tri-Cities, Tennessee)]]
 
 
 
[[Cleveland, Ohio| 41, -82 (Cleveland, Ohio)]]
 
 
 
[[Greenville, South Carolina| 34, -82 (Greenville, South Carolina)]]
 
 
 
[[Gainesville, Florida| 29, -82 (Gainesville, Florida)]]
 
 
 
[[Fort Myers, Florida| 26, -81 (Fort Myers, Florida)]]
 
 
 
[[Gastonia, North Carolina|35, -81 (Gastonia, North Carolina)]]
 
 
 
[[Mentor, Ohio| 41, -81 (Mentor, Ohio)]]
 
 
 
[[Pittsburgh, Pennsylvania|40, -81/-80 (Pittsburgh, Pennsylvania)]]
 
 
 
[[Orlando, Florida|28, -81 (Orlando, Florida)]]
 
 
 
[[Charlotte, North Carolina|35, -80 (Charlotte, North Carolina)]]
 
 
 
[[Miami, Florida|25, -80 (Miami, Florida)]]
 
 
 
[[Waterloo, Ontario, Canada|43, -80 (Waterloo, Ontario, Canada)]]
 
 
 
[[Toronto, Canada|43, -79 (Toronto, Ontario, Canada)]]
 
 
 
[[Shenandoah Valley, Virginia| 38, -78 (Shenandoah Valley, Virginia)]]
 
 
 
[[Raleigh, North Carolina|35, -78 (Raleigh, North Carolina)]]
 
 
 
[[Rochester, New York|43, -77 (Rochester, New York)]]
 
 
 
[[West Washington, District of Columbia|38, -77 (Western Washington, DC)]]
 
 
 
[[Richmond, Virginia| 37, -77 (Richmond, Virginia)]]
 
 
 
[[Ithaca, New York|42, -76 (Ithaca, New York)]]
 
 
 
[[Baltimore, Maryland|39, -76 (Baltimore, Maryland)]]
 
 
 
[[East Washington, District of Columbia|38, -76 (Eastern Washington, DC)]]
 
 
 
[[Ottawa, Canada|45, -75 (Ottawa, Ontario, Canada)]]
 
 
 
[[Allentown, Pennsylvania|40, -75 (Allentown, PA)]]
 
 
 
[[Philadelphia, Pennsylvania|39, -75 (Philadelphia, PA)]]
 
 
 
[[Newark, New Jersey|40, -74 (Newark, NJ)]]
 
 
 
[[Atlantic City, New Jersey|39, -74 (Atlantic City, NJ)]]
 
 
 
[[Montreal, Quebec|45, -73 (Montreal, QC)]]
 
 
 
[[Burlington, Vermont|44, -73 (Burlington, VT)]]
 
 
 
[[Glens Falls, New York|43, -73 (Glens Falls, NY)]]
 
 
 
[[Albany, New York|42, -73 (Albany, New York)]]
 
 
 
[[Danbury, Connecticut|41, -73 (Danbury, Connecticut)]]
 
 
 
[[New York, New York|40, -73 (New York City)]]
 
 
 
[[Springfield, Massachusetts|42, -72 (Springfield, Massachusetts)]]
 
 
 
[[Hartford, Connecticut| 41, -72 (Hartford, Connecticut)]]
 
 
 
[[Boston|42, -71 (Boston, Massachusetts)]]
 
 
 
[[Providence, Rhode Island| 41, -71 (Providence, Rhode Island)]]
 
 
 
[[Halifax, Nova Scotia, Canada|44, -63 (Halifax, Nova Scotia, Canada)]]
 
 
 
[[Fairfax, Virginia| -77, 38 (Fairfax, Virginia)]]
 
 
 
=== Central America ===
 
 
 
[[San Salvador, El Salvador|13, -89 (San Salvador, El Salvador)]]
 
 
 
=== South America ===
 
 
 
[[São Paulo, Brazil|-23, -46 (São Paulo, Brazil)]]
 
 
 
[[Buenos Aires, Argentina|-34, -58 (Buenos Aires, Argentina)]]
 
 
 
== Recent Expeditions ==
 
 
 
[[2008-05-21 42 -71]] -- [[User:Xkcd]] and cousin Annuska reached the [[Boston]] coordinates and photographed a spider.
 
 
 
[[2008-05-17 37 -122]] -- [[User:Zigdon|Dan]], Emad, and [[User:Xkcd|Randall]] reached the San Francisco coordinates in a successful test.
 
 
 
[[2008-02-24 45 -122]] -- [[User:NoTerminal|NoTerminal]] and [[User:Drache|Drache]] reached this point as part of an early test while coming up with the algorithm.
 
 
 
== Next Upcoming Day ==
 
 
 
[[2008-05-21]] -- The coordinates for Wednesday, May 21st are available.
 
 
 
== Next Saturday ==
 
 
 
[[2008-05-24]] -- The coordinates for Saturday, May 24th will become available on Friday about 9:30 AM EDT, when the Friday Dow Jones opening price is published.
 
 
 
See [http://www.timeanddate.com/worldclock/fixedtime.html?month=5&day=23&year=2008&hour=9&min=30&sec=0&p1=179| TimeandDate.com] for Dow opening time in local time zones.
 
 
 
== Related Projects ==
 
 
 
[http://geocaching.com Geocaching: Global GPS cache hunt]
 
 
 
[http://geodashing.gpsgames.org Geodashing: Monthly points, randomly created]
 
 
 
[http://www.confluence.org The Degree Confluence Project: visiting every integer latitude/longitude crossing point in the world]
 
 
 
[[Category:Active Graticules]]
 

Latest revision as of 18:53, 21 July 2024

The Adventure Starts Here

Geohashing is a global game of spontaneous adventure generation with over 17,000 expeditions since 2008. You will explore random locations, meet fellow geohashers, brave the elements, unlock achievements, and then come back here to document your expedition.

Flag of Catalonia.png Català - Flag of Germany.png Deutsch - Flag of Spain.png Flag of Mexico.png Flag of Chile.png Español - Flag of France.png Français - Flag of Italy.png Italiano - Flag of Poland.png Polski - 800px-Flag of Sweden.png Svenska - other languages.

"I've washed off the dried blood, emptied my pockets of twigs and pine park fragments and showered the resinous detritus out of my hair."
find some more great geohashing quotations here.
The Algorithm was invented for xkcd comic #426, published on 21 May 2008.

How to play?

  1. Get today's coordinates with a coordinate calculator
  2. Go there (or as close as you safely and legally can)
  3. Create an account (Returning after a break? All accounts created before 2020-02-02 were deleted; you'll need to sign up again)
  4. Write about your expedition!

How does Geohashing work?

Everyday, an algorithm generates a random coordinate from stock market data. That coordinate can be applied to every 1°×1° latitude/longitude graticule in the world, giving a point that might be in a field, a forest, a city, or even out at sea! Everyone in the world gets the same set of coordinates relative to their graticule.

Each day, people try to get their nearest generated coordinate, for an adventure, to discover somewhere new, or to meet up with other geohashers. Afterwards, you can 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)! Join the other 'spot spotters', be out standing in your field and use this wiki to document the daily coordinates (geohashes) you’ve been to or tried to reach.

Each day there is also a single globalhash somewhere on Earth: rare, valued and much harder to reach.

Learn more

How to geohash:

Other people's expeditions:

Get involved


news archiveEdit What's new on the wiki?

  • The most active graticules for 2024-09 were 47,8 and 55,-4.

More pages needing discussionDiscussion archiveEdit Now discussing - please join in: 


Official xkcd meetups

Felix Dance, Mdixon4, Rhonda, Lachie and Stevage meet up at the 28 December 2015 (a Monday) coordinates for Bairnsdale, VIC, Australia.

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.

Gallery of recent expeditions

Every expedition should have one photo in that day's gallery, selected manually. Please add yours with the "add" link. If that day's gallery hasn't been started yet, please start it.


Recent Expeditions


Recent and Upcoming Coordinates

The coordinates for the next Saturday meetups, scheduled for 2 November 2024, will be based on the Dow’s opening price published at 09:30 EDT (13:30 UTC) on Friday 1 November. 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.


Expeditions Being Planned

Expeditions and Plans

2024-10-31
Berlin, Germany coyotebush Backyard of a building in Berlin-Lichtenberg.
Glasgow, United Kingdom KerrMcF In a field near Tarbolton.

Recent Expeditions

Expeditions and Plans

2024-10-30
Beersheba, Israel Yerushalmi In an under-construction neighborhood on the outskirts of Ofakim.
München, Germany Iqui In a forest in Eching
Berlin, Germany Coyotebush On a path in Königs Wusterhausen

Expeditions and Plans

2024-10-29
Beersheba, Israel Yerushalmi Around the back of a lot in Sde Moshe. Multiple satellite images all have a...
Zürich, Switzerland globescorer located in a field near Wilen b. Neunforn (ZH).
Sheffield, United Kingdom Dustlined A heavily wooded area on the outskirts of Huddersfield, West Yorkshire.

Expeditions and Plans

2024-10-28
Brandenburg, Germany coyotebush In a forest between Damsdorf and Göhlsdorf.


Recent non-expeditions

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

2013 - 2014 - 2015 - 2017 - 2020