Grid Point Code
Source on GitHub

Play

Havana

Cuba

Grid Point Code for Havana
With a code
#GGCWM-5GJFC
Said aloud
Havana 5GJFC

Get the code for your door

What the code says

The Grid Point Code for Havana is #GGCWM-5GJFC. It names a cell 2.56 m north to south and 3.14 m east to west, centred on 23°07'58.89"N, 82°22'58.93"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 Havana, near its centre, and Havana is the capital of Cuba.

Code
#GGCWM-5GJFC
With a check character
#GGCWM-5GJFC*M
Short form
5GJFC
Cell centre
23.133024, -82.383037
Cell size
2.56 m by 3.14 m
Country
Cuba
Population
2,163,824

How to give this address

On a sign, a form or a delivery note

The whole code, #GGCWM-5GJFC. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Cuba

Havana 5GJFC: 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 4.9 km east or west of Havana. 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

#GGCWM-5GJFC*M. 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 49.1 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. GGCWMetropolitan area40 km by 49.1 km
  2. GGCWMDistrict8 km by 9.83 km
  3. GGCWM5Suburb1.6 km by 1.97 km
  4. GGCWM5GA few streets320 m by 393 m
  5. GGCWM5GJBuilding64 m by 78.6 m
  6. GGCWM5GJFEntrance12.8 m by 15.7 m
  7. GGCWM5GJFCDoorway2.56 m by 3.14 m

More in Cuba

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