Saint-Denis

What the code says

The Grid Point Code for Saint-Denis is #8C89T-W0RPR. It names a cell 2.56 m north to south and 3.20 m east to west, centred on 20°52'56.34"S, 55°27'01.49"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 Saint-Denis, near its centre, and Saint-Denis is the capital of Réunion.

Code

#8C89T-W0RPR

With a check character

#8C89T-W0RPR*T

Short form

W0RPR

Cell centre

-20.882316, 55.450414

Cell size

2.56 m by 3.20 m

Region

Reunion

Country

Réunion

Population

154,765

How to give this address

On a sign, a form or a delivery note

The whole code, #8C89T-W0RPR. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Reunion

Saint-Denis W0RPR: 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 Saint-Denis. 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

#8C89T-W0RPR*T. 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 49.9 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. 98C89Metropolitan area40 km by 49.9 km
2. T8C89TDistrict8 km by 9.98 km
3. W8C89TWSuburb1.6 km by 2 km
4. 08C89TW0A few streets320 m by 399 m
5. R8C89TW0RBuilding64 m by 79.9 m
6. P8C89TW0RPEntrance12.8 m by 16 m
7. R8C89TW0RPRDoorway2.56 m by 3.2 m

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