Geocaching is an outdoor recreational activity, in which participants use a
Global Positioning System (GPS)
receiver
or mobile device and other navigational techniques to hide and seek
containers, called "geocaches" or "caches", anywhere in the world.
A typical cache is a small waterproof container containing a
logbook
(with a pen or pencil). The geocacher enters the date they found it and
signs it with their established code name. After signing the log, the
cache must be placed back exactly where the person found it. Larger
containers such as plastic storage containers (
Tupperware or similar) or
ammunition boxes
can also contain items for trading, such as toys or trinkets, usually
of more sentimental worth than financial. Geocaching shares many aspects
with
benchmarking,
trigpointing,
orienteering,
treasure-hunting,
letterboxing, and
waymarking.
History
Geocaching was originally similar to the 160-year-old game
letterboxing, which uses clues and references to
landmarks embedded in stories. Geocaching was conceived shortly after the removal of
Selective Availability from the
Global Positioning System on May 2, 2000, because the improved accuracy
of the system allowed for a small container to be specifically placed
and located. The first documented placement of a GPS-located cache took
place on May 3, 2000, by Dave Ulmer of
Beavercreek,
Oregon. The location was posted on the
Usenet newsgroup sci.geo.satellite-nav as
45°17.460′N 122°24.800′W. By May 6, 2000, it had been found twice and logged once (by Mike Teague of
Vancouver,
Washington).
According to Dave Ulmer's message, this cache was a black plastic
bucket that was partially buried and contained software, videos, books,
food, money, and a slingshot. A geocache and plaque called the Original Stash Tribute Plaque now sit at the site.
The activity was originally referred to as
GPS stash hunt or
gpsstashing. This was changed shortly after the original hide when it was suggested in the gpsstash
eGroup that "stash" could have negative connotations and the term
geocaching was adopted.
Over time, a variety of different hide-and-seek-type activities have
been created or abandoned, so that "geocaching" now may refer to hiding
and seeking containers, or locations or information without containers.
An independent accounting of the early history documents several
controversial actions taken by Irish and Grounded, Inc., a predecessor
to
Groundspeak, to increase "commercialization and monopolistic control over the hobby"
. More recently, other similar hobbies such as
Munzee
have attracted some geocachers by rapidly adopting smart-phone
technology, which has caused "some resistance from geocaching organizers
about placing caches along with munzees".
https://en.wikipedia.org/wiki/Geocaching