Saint John's

What the code says

The Grid Point Code for Saint John's is #GJ0GH-K094F. It names a cell 2.56 m north to south and 3.27 m east to west, centred on 17°07'15.48"N, 61°50'35.80"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 Saint John's, near its centre, and Saint John's is the capital of Antigua and Barbuda.

Code

#GJ0GH-K094F

With a check character

#GJ0GH-K094F*R

Short form

K094F

Cell centre

17.120966, -61.843277

Cell size

2.56 m by 3.27 m

Region

Saint John Parish

Country

Antigua and Barbuda

Population

51,737

How to give this address

On a sign, a form or a delivery note

The whole code, #GJ0GH-K094F. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Saint John Parish

Saint John's K094F: 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 Saint John's. 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

#GJ0GH-K094F*R. 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 51.1 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. GGJ0GMetropolitan area40 km by 51.1 km
2. HGJ0GHDistrict8 km by 10.2 km
3. KGJ0GHKSuburb1.6 km by 2.04 km
4. 0GJ0GHK0A few streets320 m by 409 m
5. 9GJ0GHK09Building64 m by 81.7 m
6. 4GJ0GHK094Entrance12.8 m by 16.3 m
7. FGJ0GHK094FDoorway2.56 m by 3.27 m