Mount Aso

What the code says

The Grid Point Code for Mount Aso is #L99K5-K6GTW. It names a cell 2.56 m north to south and 2.87 m east to west, centred on 32°53'06.01"N, 131°06'14.97"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

Volcano in Kumamoto Prefecture, Japan

Code

#L99K5-K6GTW

With a check character

#L99K5-K6GTW*F

Short form

K6GTW

Cell centre

32.885004, 131.104159

Cell size

2.56 m by 2.87 m

Region

Kumamoto Prefecture

Country

Japan

How to give this address

On a sign, a form or a delivery note

The whole code, #L99K5-K6GTW. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Kumamoto Prefecture

Mount Aso K6GTW: 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 4.5 km east or west of Mount Aso. 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

#L99K5-K6GTW*F. 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 44.9 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. KL99KMetropolitan area40 km by 44.9 km
2. 5L99K5District8 km by 8.97 km
3. KL99K5KSuburb1.6 km by 1.79 km
4. 6L99K5K6A few streets320 m by 359 m
5. GL99K5K6GBuilding64 m by 71.8 m
6. TL99K5K6GTEntrance12.8 m by 14.4 m
7. WL99K5K6GTWDoorway2.56 m by 2.87 m

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