Khartoum

Sudan

With a code: #JL8L1-XR45T
Said aloud: Khartoum XR45T

What the code says

The Grid Point Code for Khartoum is #JL8L1-XR45T. It names a cell 2.56 m north to south and 3.29 m east to west, centred on 15°33'06.41"N, 32°31'56.65"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 Khartoum, near its centre, and Khartoum is the capital of Sudan.

Code: #JL8L1-XR45T
With a check character: #JL8L1-XR45T*9
Short form: XR45T
Cell centre: 15.551781, 32.532403
Cell size: 2.56 m by 3.29 m
Country: Sudan
Population: 1,974,647

How to give this address

On a sign, a form or a delivery note: The whole code, #JL8L1-XR45T. It needs nothing else: no city, no street, no network to read it back.
Said aloud, in Sudan: Khartoum XR45T: 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 Khartoum. 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: #JL8L1-XR45T*9. 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 51.5 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.

JL8LMetropolitan area40 km by 51.5 km
JL8L1District8 km by 10.3 km
JL8L1XSuburb1.6 km by 2.06 km
JL8L1XRA few streets320 m by 412 m
JL8L1XR4Building64 m by 82.4 m
JL8L1XR45Entrance12.8 m by 16.5 m
JL8L1XR45TDoorway2.56 m by 3.29 m

More in Sudan

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