Ennedi Plateau

What the code says

The Grid Point Code for Ennedi Plateau is #JMPF9-2HLPF. It names a cell 2.56 m north to south and 3.27 m east to west, centred on 17°00'00.02"N, 22°59'59.95"E, 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

Mountain range in Chad, Africa

Code

#JMPF9-2HLPF

With a check character

#JMPF9-2HLPF*L

Short form

2HLPF

Cell centre

17.000006, 22.999987

Cell size

2.56 m by 3.27 m

Region

Ennedi-Est

Country

Chad

How to give this address

On a sign, a form or a delivery note

The whole code, #JMPF9-2HLPF. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Ennedi-Est

Ennedi Plateau 2HLPF: 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 Ennedi Plateau. 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

#JMPF9-2HLPF*L. 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. FJMPFMetropolitan area40 km by 51.1 km
2. 9JMPF9District8 km by 10.2 km
3. 2JMPF92Suburb1.6 km by 2.04 km
4. HJMPF92HA few streets320 m by 409 m
5. LJMPF92HLBuilding64 m by 81.8 m
6. PJMPF92HLPEntrance12.8 m by 16.4 m
7. FJMPF92HLPFDoorway2.56 m by 3.27 m

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