Port-aux-Français

What the code says

The Grid Point Code for Port-aux-Français is #4PHD1-FR17W. It names a cell 2.56 m north to south and 2.23 m east to west, centred on 49°20'56.97"S, 70°13'09.70"E, 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-aux-Français, near its centre, and Port-aux-Français is the capital of French Southern Territories.

Code

#4PHD1-FR17W

With a check character

#4PHD1-FR17W*P

Short form

FR17W

Cell centre

-49.349157, 70.219361

Cell size

2.56 m by 2.23 m

Region

Kerguelen

Country

French Southern Territories

Population

45

How to give this address

On a sign, a form or a delivery note

The whole code, #4PHD1-FR17W. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Kerguelen

Port-aux-Français FR17W: 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 3.5 km east or west of Port-aux-Français. 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

#4PHD1-FR17W*P. 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 34.8 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. D4PHDMetropolitan area40 km by 34.8 km
2. 14PHD1District8 km by 6.96 km
3. F4PHD1FSuburb1.6 km by 1.39 km
4. R4PHD1FRA few streets320 m by 278 m
5. 14PHD1FR1Building64 m by 55.7 m
6. 74PHD1FR17Entrance12.8 m by 11.1 m
7. W4PHD1FR17WDoorway2.56 m by 2.23 m