Difference between revisions of "426: Geohashing"
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− | [http://wiki.xkcd.com/geohashing/ Geohashing] is a sport based on reaching a random location determined by an [http://wiki.xkcd.com/geohashing/Algorithm algorithm] that involves the current date, location and {{w|Dow Jones Industrial Average|Dow}} opening price. | + | {{w|Geocaching}} is a sport where you have to find things hidden by other people based on geographical coordinates. |
+ | |||
+ | [http://wiki.xkcd.com/geohashing/ Geohashing] is a sport created by Randall based on reaching a random location determined by an [http://wiki.xkcd.com/geohashing/Algorithm algorithm] that involves the current date, location and {{w|Dow Jones Industrial Average|Dow}} opening price. | ||
+ | |||
+ | The algorithm is built in a way that: | ||
+ | * makes it impossible to plan a meeting in advance (because of the Dow) | ||
+ | * changes every day | ||
+ | * gathers people that are nearby (everyone within the same 1°×1° grid square gets the same position) | ||
+ | |||
+ | Originally intended as a joke, there are people which do geohashing regularly. Please see the link to the xkcd wiki above. | ||
+ | |||
{{incomplete}} | {{incomplete}} | ||
Revision as of 23:34, 11 February 2013
Geohashing |
Title text: Saturday is game night |
Explanation
Geocaching is a sport where you have to find things hidden by other people based on geographical coordinates.
Geohashing is a sport created by Randall based on reaching a random location determined by an algorithm that involves the current date, location and Dow opening price.
The algorithm is built in a way that:
- makes it impossible to plan a meeting in advance (because of the Dow)
- changes every day
- gathers people that are nearby (everyone within the same 1°×1° grid square gets the same position)
Originally intended as a joke, there are people which do geohashing regularly. Please see the link to the xkcd wiki above.
This explanation may be incomplete or incorrect: Please include the reason why this explanation is incomplete, like this: {{incomplete|reason}} If you can address this issue, please edit the page! Thanks. |
Transcript
- Date (example): 2005-05-26
- That date's (or most recent) DOW opening: 10458.68
- [Concatenate, with a hyphen: 2005-05-26-10458.68]
- md5: db9318c2259923d08b672cb305440f97
- [Split it up into two pieces:]
- 0.db9318c2259923d0, 0.8b672cb305440f97
- To decimal: 0.857713..., 0.544544...
- Your location (example): 37.421542, -122.085589
- [Combine integer part of location with fractional part of hash:]
- Destination Coordinates: 37.857713, -122.544544
- Sample Implementation: http://xkcd.com/geohashing/
Discussion
Isn't there an app for this? Or am I just confused? Unpopular Opinions (talk) 18:13, 13 February 2020 (UTC)
- There are lots of them for different platforms, in fact. 162.158.203.21 10:02, 11 January 2021 (UTC)
The official implementation (http://xkcd.org/geohashing that redirects to http://carabiner.peeron.com/xkcd/map/map.html) doesn't seem to be working anymore.
- There are other implementations, such as https://geohashing.info/ --XXOs (talk) 01:06, 8 September 2021 (UTC)
Should there be a thing about the 30W rule? --XXOs (talk) 01:06, 8 September 2021 (UTC)