Madinah

What the code says

The Grid Point Code for Madinah is #JGMF2-WM493. It names a cell 2.56 m north to south and 3.11 m east to west, centred on 24°28'06.99"N, 39°36'50.98"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 Madinah, near its centre.

Code

#JGMF2-WM493

With a check character

#JGMF2-WM493*M

Short form

WM493

Cell centre

24.468607, 39.614162

Cell size

2.56 m by 3.11 m

Region

Medina Region

Country

Saudi Arabia

Population

1,300,000

How to give this address

On a sign, a form or a delivery note

The whole code, #JGMF2-WM493. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Medina Region

Madinah WM493: 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 4.9 km east or west of Madinah. 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

#JGMF2-WM493*M. 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 48.6 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. FJGMFMetropolitan area40 km by 48.6 km
2. 2JGMF2District8 km by 9.73 km
3. WJGMF2WSuburb1.6 km by 1.95 km
4. MJGMF2WMA few streets320 m by 389 m
5. 4JGMF2WM4Building64 m by 77.8 m
6. 9JGMF2WM49Entrance12.8 m by 15.6 m
7. 3JGMF2WM493Doorway2.56 m by 3.11 m

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