Jeddah

What the code says

The Grid Point Code for Jeddah is #JG83M-C5RM3. It names a cell 2.56 m north to south and 3.18 m east to west, centred on 21°29'24.40"N, 39°11'10.44"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 Jeddah, near its centre.

Code

#JG83M-C5RM3

With a check character

#JG83M-C5RM3*J

Short form

C5RM3

Cell centre

21.490111, 39.186232

Cell size

2.56 m by 3.18 m

Region

Mecca Region

Country

Saudi Arabia

Population

4,697,000

How to give this address

On a sign, a form or a delivery note

The whole code, #JG83M-C5RM3. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Mecca Region

Jeddah C5RM3: 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 Jeddah. 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

#JG83M-C5RM3*J. 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 49.7 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. 3JG83Metropolitan area40 km by 49.7 km
2. MJG83MDistrict8 km by 9.94 km
3. CJG83MCSuburb1.6 km by 1.99 km
4. 5JG83MC5A few streets320 m by 398 m
5. RJG83MC5RBuilding64 m by 79.5 m
6. MJG83MC5RMEntrance12.8 m by 15.9 m
7. 3JG83MC5RM3Doorway2.56 m by 3.18 m

More in Saudi Arabia

• Souq al-Zal
• Riyadh
• Makkah
• Madinah
• Dammam
• Sulţānah
• Buraydah
• Ta'if
• Tabuk
• Ha'il
• Najrān
• Hegra