Ameya-Yokochō

What the code says

The Grid Point Code for Ameya-Yokochō is #L8R34-XX65T. It names a cell 2.56 m north to south and 2.78 m east to west, centred on 35°42'36.19"N, 139°46'28.35"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

Open-air market in Tokyo

Code

#L8R34-XX65T

With a check character

#L8R34-XX65T*J

Short form

XX65T

Cell centre

35.710053, 139.774541

Cell size

2.56 m by 2.78 m

City

Tokyo

Region

Tokyo

Country

Japan

How to give this address

On a sign, a form or a delivery note

The whole code, #L8R34-XX65T. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Tokyo

Ameya-Yokochō XX65T: 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 4.3 km east or west of Ameya-Yokochō. 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

#L8R34-XX65T*J. 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 43.4 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. 3L8R3Metropolitan area40 km by 43.4 km
2. 4L8R34District8 km by 8.68 km
3. XL8R34XSuburb1.6 km by 1.74 km
4. XL8R34XXA few streets320 m by 347 m
5. 6L8R34XX6Building64 m by 69.4 m
6. 5L8R34XX65Entrance12.8 m by 13.9 m
7. TL8R34XX65TDoorway2.56 m by 2.78 m

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