Grid Point Code

Play

Nagasaki

Japan

With a code
#L99P2-X6DN2
Said aloud
Nagasaki X6DN2

Get the code for your door

What the code says

The Grid Point Code for Nagasaki is #L99P2-X6DN2. It names a cell 2.56 m north to south and 2.88 m east to west, centred on 32°44'59.96"N, 129°52'59.93"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 Nagasaki, near its centre.

Code
#L99P2-X6DN2
With a check character
#L99P2-X6DN2*3
Short form
X6DN2
Cell centre
32.749989, 129.883315
Cell size
2.56 m by 2.88 m
Country
Japan
Population
409,118

How to give this address

On a sign, a form or a delivery note

The whole code, #L99P2-X6DN2. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Japan

Nagasaki X6DN2: 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 Nagasaki. 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

#L99P2-X6DN2*3. 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. L99PMetropolitan area40 km by 44.9 km
  2. L99P2District8 km by 8.99 km
  3. L99P2XSuburb1.6 km by 1.8 km
  4. L99P2X6A few streets320 m by 360 m
  5. L99P2X6DBuilding64 m by 71.9 m
  6. L99P2X6DNEntrance12.8 m by 14.4 m
  7. L99P2X6DN2Doorway2.56 m by 2.88 m

More in Japan

City, region and population from GeoNames, under CC BY 4.0.