Grid Point Code

Play

Annaba

Algeria

With a code
#J0WDC-HFFHD
Said aloud
Annaba HFFHD

Get the code for your door

What the code says

The Grid Point Code for Annaba is #J0WDC-HFFHD. It names a cell 2.56 m north to south and 2.73 m east to west, centred on 36°54'00.00"N, 7°46'00.03"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 Annaba, near its centre.

Code
#J0WDC-HFFHD
With a check character
#J0WDC-HFFHD*F
Short form
HFFHD
Cell centre
36.900000, 7.766676
Cell size
2.56 m by 2.73 m
Country
Algeria
Population
342,703

How to give this address

On a sign, a form or a delivery note

The whole code, #J0WDC-HFFHD. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Algeria

Annaba HFFHD: 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 Annaba. 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

#J0WDC-HFFHD*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 42.7 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. J0WDMetropolitan area40 km by 42.7 km
  2. J0WDCDistrict8 km by 8.55 km
  3. J0WDCHSuburb1.6 km by 1.71 km
  4. J0WDCHFA few streets320 m by 342 m
  5. J0WDCHFFBuilding64 m by 68.4 m
  6. J0WDCHFFHEntrance12.8 m by 13.7 m
  7. J0WDCHFFHDDoorway2.56 m by 2.73 m

More in Algeria

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