Old Market of Roseau

What the code says

The Grid Point Code for Old Market of Roseau is #GJ9FC-F6MKD. It names a cell 2.56 m north to south and 3.30 m east to west, centred on 15°17'47.97"N, 61°23'13.95"W, 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

Building in Roseau, Dominica

Code

#GJ9FC-F6MKD

With a check character

#GJ9FC-F6MKD*M

Short form

F6MKD

Cell centre

15.296659, -61.387208

Cell size

2.56 m by 3.30 m

City

Roseau

Region

Saint George Parish

Country

Dominica

How to give this address

On a sign, a form or a delivery note

The whole code, #GJ9FC-F6MKD. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Roseau

Old Market of Roseau F6MKD: 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 5.2 km east or west of Old Market of Roseau. 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

#GJ9FC-F6MKD*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 51.5 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. FGJ9FMetropolitan area40 km by 51.5 km
2. CGJ9FCDistrict8 km by 10.3 km
3. FGJ9FCFSuburb1.6 km by 2.06 km
4. 6GJ9FCF6A few streets320 m by 412 m
5. MGJ9FCF6MBuilding64 m by 82.5 m
6. KGJ9FCF6MKEntrance12.8 m by 16.5 m
7. DGJ9FCF6MKDDoorway2.56 m by 3.3 m

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