Trojmetrová keš
Meranie dĺžky bolo v minulosti celkom výzvou. Hlavne pokiaľ mali dvaja rôzni ľudia namerať rovnakú vzdialenosať. Historické miery boli síce vcelku dobre zadefinované, no vždy to malo háčik. Palec - dĺžka troch zŕn jačmeňa, piaď - vzdialenosť medzi koncom palca a malíčka na roztiahnutej dlani, siaha - dĺžka medzi koncami prstov rozpaženého muža, míľa - tisíc dvojkrokov... asi je to jasné. Dvojmetrový chlap nameral voľačo iné, ako drobná ženička. Nehovoriac o tom, že poukladať za sebou 42 zrniek obilia chcelo celkom solídnu dávku trpezlivosti.
Múdre hlavy koncom 18. storočia vymysleli mnohé šikovné veci, ktoré nám dodnes uľahčujú merania, napríklad taký metrický systém (pokiaľ teda nežjete v Amerike):
A v tej dobe bol prvý krát zadefinovaný aj "meter" ako základná jednotka dĺžky. Pri jeho určovaní si vtedajší vedátori kládli na srdce, aby bežní ľudia nemuseli pobehovať po svete s vreckom jačmeňa alebo sa na trhu navzájom hádať, koho predlaktie je lepšie meradlo. Zobrali to čisto abstraktne a povedali si, že čiara medzi rovníkom a severným pólom, ktorá vedie cez Paríž, má presne desať miliónov metrov (ok, pre science freakov, nebola to čiara ale poludník). Neskôr vyrobili aj vzorovú metrovú tyč z fajnových zliatin a potom to ešte niekoľko krát zmenili až po dnešnú definíciu odvodenú od rýchlosti svetla. Je to super, dnes teda vieme merať s presnosťou na jeden atóm hore - dole. Približne.
Keška sa nachádza zhruba na publikovaných súradniciach. Netreba po ňu liezť cez ploty. Je asi tak meter nad zemou (alebo o kúsok viac) a má približne tri metre (plus mínus pár atómov hore dole). Veselé lovenie a hlavne nenápadne.
EN listing: Three-metre-long cache
Measuring length was quite a challenge in the past. Especially if two different people were to measure the same distance. Although the historical measurement units were quite well defined, it always had a catch. Thumb - the length of three grains of barley, palm - the distance between the end of the thumb and the little finger on the outstretched palm, reach - the length between the fingertips of an outstretched man, a mile - one thousand two-steps ... it's probably clear. A two-meter-old man measured something other than a tiny woman. Not to mention that stacking 42 grains of grain in a row required quite a solid dose of patience.
At the end of the 18th century, wise heads invented many clever things that make measurements easier for us, such as the metric system (unless you live in America). And at that time, "meter" was defined for the first time as the basic unit of length. In determining it, scientists of the time thought about the ordinary people, that they would not have to run around the world with a pocket of barley or argue who's feet is better measuring tool. They took it in a purely abstract way and told themselves that the line between the equator and the North Pole, which runs through Paris, is exactly ten million meters (for the scientific fellows, it was not a line but a meridian). Later, they also made a model meter rod from fine alloys, and then changed it several more times to today's definition derived from the speed of light. It's great, today we can measure with an accuracy of one atom, plus minus. Approximately.
The cache is located approximately on the published coordinates. No need to climb over fences. It is about a meter above the ground (or a little more) and has about three meters (plus or minus an atom or two). Happy hunting.
Geocache v 1.0 / Listing v 1.0