Athens

What the code says

The Grid Point Code for Athens is #J150F-CJX1X. It names a cell 2.56 m north to south and 2.70 m east to west, centred on 37°59'01.52"N, 23°43'40.21"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 Athens, near its centre, and Athens is the capital of Greece.

Code

#J150F-CJX1X

With a check character

#J150F-CJX1X*N

Short form

CJX1X

Cell centre

37.983756, 23.727836

Cell size

2.56 m by 2.70 m

Region

Attica

Country

Greece

Population

664,046

How to give this address

On a sign, a form or a delivery note

The whole code, #J150F-CJX1X. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Attica

Athens CJX1X: 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 4.2 km east or west of Athens. 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

#J150F-CJX1X*N. 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 42.1 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. 0J150Metropolitan area40 km by 42.1 km
2. FJ150FDistrict8 km by 8.42 km
3. CJ150FCSuburb1.6 km by 1.68 km
4. JJ150FCJA few streets320 m by 337 m
5. XJ150FCJXBuilding64 m by 67.4 m
6. 1J150FCJX1Entrance12.8 m by 13.5 m
7. XJ150FCJX1XDoorway2.56 m by 2.7 m

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