Grid Point Code

Play

Mount Nyiragongo

near GomaNorth KivuDemocratic Republic of the Congo

With a code
#822X9-W7J4G
Said aloud
Mount Nyiragongo W7J4G

Open in the playground

What the code says

The Grid Point Code for Mount Nyiragongo is #822X9-W7J4G. It names a cell 2.56 m north to south and 3.42 m east to west, centred on 1°31'00.00"S, 29°15'00.01"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
Active volcano in Democratic Republic of the Congo
Code
#822X9-W7J4G
With a check character
#822X9-W7J4G*6
Short form
W7J4G
Cell centre
-1.516666, 29.250002
Cell size
2.56 m by 3.42 m
Region
North Kivu
Country
Democratic Republic of the Congo

How to give this address

On a sign, a form or a delivery note

The whole code, #822X9-W7J4G. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in North Kivu

Mount Nyiragongo W7J4G: 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 Mount Nyiragongo. 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

#822X9-W7J4G*6. 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 53.4 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. 822XMetropolitan area40 km by 53.4 km
  2. 822X9District8 km by 10.7 km
  3. 822X9WSuburb1.6 km by 2.14 km
  4. 822X9W7A few streets320 m by 427 m
  5. 822X9W7JBuilding64 m by 85.5 m
  6. 822X9W7J4Entrance12.8 m by 17.1 m
  7. 822X9W7J4GDoorway2.56 m by 3.42 m

More in Democratic Republic of the Congo

Place and region from Wikidata, described on Wikipedia; nearby town from GeoNames, under CC BY 4.0.