Lake Retba

What the code says

The Grid Point Code for Lake Retba is #H67JJ-2DJ3T. It names a cell 2.56 m north to south and 3.31 m east to west, centred on 14°50'20.04"N, 17°14'04.05"W, and it turns back into that cell on any phone or computer by arithmetic alone: no network, no account, no lookup table.

What it is

Pink lake in Senegal

Code

#H67JJ-2DJ3T

With a check character

#H67JJ-2DJ3T*H

Short form

2DJ3T

Cell centre

14.838900, -17.234458

Cell size

2.56 m by 3.31 m

Region

Dakar

Country

Senegal

How to give this address

On a sign, a form or a delivery note

The whole code, #H67JJ-2DJ3T. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Dakar

Lake Retba 2DJ3T: 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 5.2 km east or west of Lake Retba. 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

#H67JJ-2DJ3T*H. 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 51.7 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. JH67JMetropolitan area40 km by 51.7 km
2. JH67JJDistrict8 km by 10.3 km
3. 2H67JJ2Suburb1.6 km by 2.07 km
4. DH67JJ2DA few streets320 m by 413 m
5. JH67JJ2DJBuilding64 m by 82.6 m
6. 3H67JJ2DJ3Entrance12.8 m by 16.5 m
7. TH67JJ2DJ3TDoorway2.56 m by 3.31 m

More in Senegal

• Dakar
• Pikine
• Touba
• Kaolack
• Saint-Louis
• Niokolo-Koba National Park