Port-au-Prince

What the code says

The Grid Point Code for Port-au-Prince is #GG45G-FM8HM. It names a cell 2.56 m north to south and 3.24 m east to west, centred on 18°32'36.52"N, 72°20'19.67"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 Port-au-Prince, near its centre, and Port-au-Prince is the capital of Haiti.

Code

#GG45G-FM8HM

With a check character

#GG45G-FM8HM*5

Short form

FM8HM

Cell centre

18.543479, -72.338796

Cell size

2.56 m by 3.24 m

Region

Ouest

Country

Haiti

Population

1,234,742

How to give this address

On a sign, a form or a delivery note

The whole code, #GG45G-FM8HM. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Ouest

Port-au-Prince FM8HM: 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 5.1 km east or west of Port-au-Prince. 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

#GG45G-FM8HM*5. 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 50.7 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. 5GG45Metropolitan area40 km by 50.7 km
2. GGG45GDistrict8 km by 10.1 km
3. FGG45GFSuburb1.6 km by 2.03 km
4. MGG45GFMA few streets320 m by 405 m
5. 8GG45GFM8Building64 m by 81.1 m
6. HGG45GFM8HEntrance12.8 m by 16.2 m
7. MGG45GFM8HMDoorway2.56 m by 3.24 m

More in Haiti

• Carrefour
• Port-de-Paix
• Citadelle Laferrière