Grid Point Code
Source on GitHub

Play

Memphis

TennesseeUnited States

Grid Point Code for Memphis
With a code
#G72F6-4XKDD
Said aloud
Memphis 4XKDD

Get the code for your door

What the code says

The Grid Point Code for Memphis is #G72F6-4XKDD. It names a cell 2.56 m north to south and 2.80 m east to west, centred on 35°08'58.33"N, 90°02'56.28"W, and it turns back into that cell on any phone or computer by arithmetic alone: no network, no account, no lookup table.

The point used is the one GeoNames records for Memphis, near its centre.

Code
#G72F6-4XKDD
With a check character
#G72F6-4XKDD*4
Short form
4XKDD
Cell centre
35.149536, -90.048968
Cell size
2.56 m by 2.80 m
Region
Tennessee
Country
United States
Population
633,104

How to give this address

On a sign, a form or a delivery note

The whole code, #G72F6-4XKDD. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Tennessee

Memphis 4XKDD: a name both people know, then the last five characters. They give back the exact code for anywhere within 4.0 km north or south and 4.4 km east or west of Memphis. Further away the same five name somewhere else, which is why the whole code is what goes on a sign.

Copied by hand, or read over a phone

#G72F6-4XKDD*4. The character on the end catches any single mistyped symbol and any two neighbours swapped.

As a link or a square code

Open it on the map, move to the exact door, and add directions if the code needs help: "blue gate, second floor". The link and the square code carry them. Nothing is kept on this site.

From the city to the door

The first four characters name a cell about 40 km by 43.7 km here. Each one after that picks one of 25 inside the last, so the whole ten name a spot about the size of a doorway.

  1. G72FMetropolitan area40 km by 43.7 km
  2. G72F6District8 km by 8.74 km
  3. G72F64Suburb1.6 km by 1.75 km
  4. G72F64XA few streets320 m by 350 m
  5. G72F64XKBuilding64 m by 69.9 m
  6. G72F64XKDEntrance12.8 m by 14 m
  7. G72F64XKDDDoorway2.56 m by 2.8 m

More in United States

City, region and population from GeoNames, under CC BY 4.0.