Recent Changes for "Geohashing" - Rochester Wiki

Geohashing

ReyTucker — 2012-11-23T20:33:27Z

deprecate twitter macro

Differences for Geohashing

Deletions are marked with - .	Additions are marked with +.
Line 22:	Line 22:
- [[Twitter(geohash,geohashing)]] -

Geohashing

ReyTucker — 2009-08-10T15:39:31Z

updating twitter macro

Differences for Geohashing

Deletions are marked with - .	Additions are marked with +.
Line 22:	Line 22:
- [[Twitter(geohash OR geohashing)]]	+ [[Twitter(geohash,geohashing)]]

Geohashing

BradMandell — 2008-07-26T17:25:30Z

add klm file and reference

Differences for Geohashing

Deletions are marked with - .	Additions are marked with +.
Line 13:	Line 13:
- The [http://wiki.xkcd.com/geohashing/Rochester%2C_New_York Rochester Rochester, New York graticule] has its southeast corner at 43 degrees north, 77 degrees west and extends to the northeast at 44 degrees north, 78 degrees west. See [http://maps.google.com/maps/ms?ie=UTF8&oe=utf-8&client=firefox-a&hl=en&msa=0&ll=43.524655,-77.530518&spn=1.935716,1.724854&z=8&msid=115035398366613199070.000452ee0bdd86426b41c RocWiki - Geohashing Google User Map]	+ The [http://wiki.xkcd.com/geohashing/Rochester%2C_New_York Rochester Rochester, New York graticule] has its southeast corner at 43 degrees north, 77 degrees west and extends to the northeast at 44 degrees north, 78 degrees west. See [http://maps.google.com/maps/ms?ie=UTF8&oe=utf-8&client=firefox-a&hl=en&msa=0&ll=43.524655,-77.530518&spn=1.935716,1.724854&z=8&msid=115035398366613199070.000452ee0bdd86426b41c RocWiki - Geohashing Google User Map] or download the [[File(RocWiki - Geohashing.kml)]] file to view in [http://earth.google.com/ Google Earth].

Geohashing

BradMandell — 2008-07-26T17:21:58Z

Upload of file RocWiki - Geohashing.kml.

Geohashing

BradMandell — 2008-07-26T17:18:33Z

add in WIP data

Differences for Geohashing

Deletions are marked with - .	Additions are marked with +.
Line 13:	Line 13:
	+ The [http://wiki.xkcd.com/geohashing/Rochester%2C_New_York Rochester Rochester, New York graticule] has its southeast corner at 43 degrees north, 77 degrees west and extends to the northeast at 44 degrees north, 78 degrees west. See [http://maps.google.com/maps/ms?ie=UTF8&oe=utf-8&client=firefox-a&hl=en&msa=0&ll=43.524655,-77.530518&spn=1.935716,1.724854&z=8&msid=115035398366613199070.000452ee0bdd86426b41c RocWiki - Geohashing Google User Map] + + A graticule is approximately 60 [wiki:wikipedia:Nautical_mile nautical miles] (69 miles[[Footnote(1.1508 miles per nautical mile)]]) north to south along its meridians and varies in width depending on the [wiki:wikipedia:Lines_of_Latitude latitude]. At the equator it is 60 nm[[Footnote(Since the earth is round and the nautical mile is defined as one minute at the equator)]] and at the poles it is zero. The farther north you go, the more difference between the width at the southern border of the graticule compared to the northern border. + +

Geohashing

ReyTucker — 2008-07-26T14:38:58Z

oops

Differences for Geohashing

Deletions are marked with - .	Additions are marked with +.
Line 17:	Line 17:
- [[Summize(geohash OR geohashing)]]	+ [[Twitter(geohash OR geohashing)]]

Geohashing

BradMandell — 2008-07-26T12:11:49Z

expand explanation

Differences for Geohashing

No differences found!

Geohashing

BradMandell — 2008-07-26T12:09:31Z

expand explanation

Differences for Geohashing

Deletions are marked with - .	Additions are marked with +.
Line 1:	Line 1:
- Rochester has a relatively active [http://wiki.xkcd.com/geohashing/Main_Page Geohashing] community. This activity, defined in [wiki:wikipedia:xkcd] [http://www.xkcd.com/426/ comic #426], is based on a random set of coordinates generated every day for people (or other autonomous beings, I suppose) to reach. Due to the nature of the algorithm, it is impossible to predict coordinates beyond the next [wiki:wikipedia:NYSE] trading day. On Saturdays around 4pm, there's an official meetup at the coordinates.	+ ["Rochester"] has a relatively active '''[http://wiki.xkcd.com/geohashing/Main_Page Geohashing]''' community and '''''is probably one of the top five geekiest cities in the US by population percentage'''''[[Footnote([http://wiki.xkcd.com/geohashing/Rochester%2C_New_York Statement on XKCD.com Rochester Graticule Page])]].
Line 3:	Line 3:
- This shares a lot of similarities with ["Geocaching" geocaching], although there's no caches and the locations are one-shot sorta deals. (Computing the probability of the geohash meetup being at the same spot twice before the end of the earth is left as an exercise for the reader.)	+ '''What is Geohashing'''
Line 5:	Line 5:
- Due to the large body of water to the north, the coordinates for the [http://wiki.xkcd.com/geohashing/Rochester%2C_New_York Rochester graticule] are frequently unreachable. In this case, go with the [http://wiki.xkcd.com/geohashing/Canandaigua-Corning%2C_New_York Canandaigua/Corning coordinates].	+ Geohashing, as defined in [wiki:wikipedia:xkcd] [http://www.xkcd.com/426/ comic #426], is based on a random set of geographic coordinates generated (hashed) every day for people (or other autonomous beings, I suppose) to reach (meetup). The hashed value is actually the offsets within a one degree graticule (on degree of latitude and of longitude), so meetups are possible within each graticule where the generated location is reachable - not water, mountain, etc.
Line 7:	Line 7:
- You can go directly to today's coordinates [http://irc.peeron.com/xkcd/map/map.html?lat=43&long=-77 here], with the backup graticule [http://irc.peeron.com/xkcd/map/map.html?lat=42&long=-77 here].	+ Due to the nature of the hashing algorithm used to generate the coordinates, it is impossible to predict them beyond the next [wiki:wikipedia:NYSE] trading day. On Saturdays around 4pm, there's an official meetup at the location specified by the coordinates. + + Geohashing shares a lot of similarities with ["Geocaching" geocaching], although there's no caches and the locations are one-shot sorta deals. (Computing the probability of the geohash meetup being at the same spot twice before the end of the earth is left as an exercise for the reader.) + + Due to the large body of water to the north, the coordinates for the graticules of [http://wiki.xkcd.com/geohashing/Rochester%2C_New_York Rochester], [http://wiki.xkcd.com/geohashing/Lockport%2C_New_York Lockport] to our west, and [http://wiki.xkcd.com/geohashing/Syracuse%2C_New_York Syracuse] to our east are frequently unreachable. In this case, Rochester geohashers may wish to go with the coordinates for the [http://wiki.xkcd.com/geohashing/Canandaigua-Corning%2C_New_York Canandaigua/Corning] graticule to our south. + + '''Notes and References''' + * Go directly to [http://irc.peeron.com/xkcd/map/map.html?lat=43&long=-77 today's coordinates.]. + * Or go to the [http://irc.peeron.com/xkcd/map/map.html?lat=42&long=-77 backup graticule coordinates for today].

Geohashing

ReyTucker — 2008-07-04T04:24:35Z

adding summize macro to see what happens

Differences for Geohashing

Deletions are marked with - .	Additions are marked with +.
Line 9:	Line 9:
	+ [[Summize(geohash OR geohashing)]] +

Geohashing

ReyTucker — 2008-06-21T16:28:23Z

adding geocaching link/paragraph

Differences for Geohashing

Deletions are marked with - .	Additions are marked with +.
Line 2:	Line 2:
	+ + This shares a lot of similarities with ["Geocaching" geocaching], although there's no caches and the locations are one-shot sorta deals. (Computing the probability of the geohash meetup being at the same spot twice before the end of the earth is left as an exercise for the reader.)

Geohashing

ReyTucker — 2008-06-21T16:17:04Z

creating page

Differences for Geohashing

Deletions are marked with - .	Additions are marked with +.
Line 1:	Line 1:
	+ Rochester has a relatively active [http://wiki.xkcd.com/geohashing/Main_Page Geohashing] community. This activity, defined in [wiki:wikipedia:xkcd] [http://www.xkcd.com/426/ comic #426], is based on a random set of coordinates generated every day for people (or other autonomous beings, I suppose) to reach. Due to the nature of the algorithm, it is impossible to predict coordinates beyond the next [wiki:wikipedia:NYSE] trading day. On Saturdays around 4pm, there's an official meetup at the coordinates. + + Due to the large body of water to the north, the coordinates for the [http://wiki.xkcd.com/geohashing/Rochester%2C_New_York Rochester graticule] are frequently unreachable. In this case, go with the [http://wiki.xkcd.com/geohashing/Canandaigua-Corning%2C_New_York Canandaigua/Corning coordinates]. + + You can go directly to today's coordinates [http://irc.peeron.com/xkcd/map/map.html?lat=43&long=-77 here], with the backup graticule [http://irc.peeron.com/xkcd/map/map.html?lat=42&long=-77 here]. + + [[Comments()]]