Grid Point Code

Play

Sendai

MiyagiJapan

With a code
#L16M7-DHPP3
Said aloud
Sendai DHPP3

Get the code for your door

What the code says

The Grid Point Code for Sendai is #L16M7-DHPP3. It names a cell 2.56 m north to south and 2.68 m east to west, centred on 38°15'59.99"N, 140°52'00.00"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 Sendai, near its centre.

Code
#L16M7-DHPP3
With a check character
#L16M7-DHPP3*8
Short form
DHPP3
Cell centre
38.266664, 140.866668
Cell size
2.56 m by 2.68 m
Region
Miyagi
Country
Japan
Population
1,096,704

How to give this address

On a sign, a form or a delivery note

The whole code, #L16M7-DHPP3. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Miyagi

Sendai DHPP3: 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 4.2 km east or west of Sendai. 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

#L16M7-DHPP3*8. 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 42 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. L16MMetropolitan area40 km by 42 km
  2. L16M7District8 km by 8.39 km
  3. L16M7DSuburb1.6 km by 1.68 km
  4. L16M7DHA few streets320 m by 336 m
  5. L16M7DHPBuilding64 m by 67.1 m
  6. L16M7DHPPEntrance12.8 m by 13.4 m
  7. L16M7DHPP3Doorway2.56 m by 2.68 m

More in Japan

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