Pettah Market

What the code says

The Grid Point Code for Pettah Market is #K16WK-69D1F. It names a cell 2.56 m north to south and 3.39 m east to west, centred on 6°56'10.50"N, 79°50'59.85"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

Building in Colombo, Sri Lanka

Code

#K16WK-69D1F

With a check character

#K16WK-69D1F*G

Short form

69D1F

Cell centre

6.936250, 79.849958

Cell size

2.56 m by 3.39 m

City

Colombo

Region

Western Province

Country

Sri Lanka

How to give this address

On a sign, a form or a delivery note

The whole code, #K16WK-69D1F. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Colombo

Pettah Market 69D1F: 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 5.3 km east or west of Pettah Market. 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

#K16WK-69D1F*G. 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 53 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. WK16WMetropolitan area40 km by 53 km
2. KK16WKDistrict8 km by 10.6 km
3. 6K16WK6Suburb1.6 km by 2.12 km
4. 9K16WK69A few streets320 m by 424 m
5. DK16WK69DBuilding64 m by 84.9 m
6. 1K16WK69D1Entrance12.8 m by 17 m
7. FK16WK69D1FDoorway2.56 m by 3.39 m

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