Geohashing Conquers the South Pole
New submitter Kjellander writes "Randall, of xkcd fame, and inventor of Geohashing, has commented on the recent successful expedition of a Globalhash less than 1 km from the Amundsen-Scott research station by 5 brave scientists staying there over winter. The last continent has been conquered and many records broken."
It may be cold at the South Pole, but it's Summer there.
geohashing is creating a random lat/long pair based on data that can only be known a little while ahead of time. Take the string "YYYY-MM-DD-#" where # is the opening of the DOW stock exchange, and create a 32bit MD5 checksum of that string. Convert the first 16 bits to decimal 0.XXXXX (convert hex to decimal, prepend 0.####) and the second 16 bits to 0.YYYYY. Now, take your current location, say 37.4215 -122.0855. Well, the location for that day's gathering near you would be at 37.XXXXX by -122.YYYYY. So you can see it isn't really a replacement for latitude and longitude, it's just a way to find a random place to gather.
Globalhashing is nearly the same. Take (180*0.XXXXX)-90 for latitude, (360*0.YYYYY)-180 longitude. Greater than a 70% chance that the day's globalhash will be in the ocean.