Nuku'alofa

What the code says

The Grid Point Code for Nuku'alofa is #DHKJN-H4WTF. It names a cell 2.56 m north to south and 3.19 m east to west, centred on 21°08'12.62"S, 175°12'04.15"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 Nuku'alofa, near its centre, and Nuku'alofa is the capital of Tonga.

Code

#DHKJN-H4WTF

With a check character

#DHKJN-H4WTF*P

Short form

H4WTF

Cell centre

-21.136838, -175.201152

Cell size

2.56 m by 3.19 m

Region

Tongatapu

Country

Tonga

Population

22,400

How to give this address

On a sign, a form or a delivery note

The whole code, #DHKJN-H4WTF. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Tongatapu

Nuku'alofa H4WTF: 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 5.0 km east or west of Nuku'alofa. 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

#DHKJN-H4WTF*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 49.8 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. JDHKJMetropolitan area40 km by 49.8 km
2. NDHKJNDistrict8 km by 9.97 km
3. HDHKJNHSuburb1.6 km by 1.99 km
4. 4DHKJNH4A few streets320 m by 399 m
5. WDHKJNH4WBuilding64 m by 79.7 m
6. TDHKJNH4WTEntrance12.8 m by 15.9 m
7. FDHKJNH4WTFDoorway2.56 m by 3.19 m