Grid Point Code

Play

Ikeja

LagosNigeria

With a code
#JP8KJ-J4GM9
Said aloud
Ikeja J4GM9

Get the code for your door

What the code says

The Grid Point Code for Ikeja is #JP8KJ-J4GM9. It names a cell 2.56 m north to south and 3.40 m east to west, centred on 6°35'47.41"N, 3°20'31.36"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 Ikeja, near its centre.

Code
#JP8KJ-J4GM9
With a check character
#JP8KJ-J4GM9*M
Short form
J4GM9
Cell centre
6.596502, 3.342044
Cell size
2.56 m by 3.40 m
Region
Lagos
Country
Nigeria
Population
313,196

How to give this address

On a sign, a form or a delivery note

The whole code, #JP8KJ-J4GM9. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Lagos

Ikeja J4GM9: 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 Ikeja. 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

#JP8KJ-J4GM9*M. 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 53.1 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. JP8KMetropolitan area40 km by 53.1 km
  2. JP8KJDistrict8 km by 10.6 km
  3. JP8KJJSuburb1.6 km by 2.12 km
  4. JP8KJJ4A few streets320 m by 425 m
  5. JP8KJJ4GBuilding64 m by 84.9 m
  6. JP8KJJ4GMEntrance12.8 m by 17 m
  7. JP8KJJ4GM9Doorway2.56 m by 3.4 m

More in Nigeria

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