Amphitheatre of El Jem

What the code says

The Grid Point Code for Amphitheatre of El Jem is #J907R-716DK. It names a cell 2.56 m north to south and 2.79 m east to west, centred on 35°17'47.01"N, 10°42'25.02"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

Carthagian amphitheatre in Tunisia

Code

#J907R-716DK

With a check character

#J907R-716DK*8

Short form

716DK

Cell centre

35.296393, 10.706949

Cell size

2.56 m by 2.79 m

Region

Mahdia Governorate

Country

Tunisia

How to give this address

On a sign, a form or a delivery note

The whole code, #J907R-716DK. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Mahdia Governorate

Amphitheatre of El Jem 716DK: 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 4.4 km east or west of Amphitheatre of El Jem. 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

#J907R-716DK*8. 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 43.6 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. 7J907Metropolitan area40 km by 43.6 km
2. RJ907RDistrict8 km by 8.72 km
3. 7J907R7Suburb1.6 km by 1.74 km
4. 1J907R71A few streets320 m by 349 m
5. 6J907R716Building64 m by 69.8 m
6. DJ907R716DEntrance12.8 m by 14 m
7. KJ907R716DKDoorway2.56 m by 2.79 m

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