Grid Point Code

Play

Lençóis Maranhenses National Park

near Primeira CruzMaranhãoBrazil

With a code
#9W79X-GF8N9
Said aloud
Lençóis Maranhenses National Park GF8N9

Open in the playground

What the code says

The Grid Point Code for Lençóis Maranhenses National Park is #9W79X-GF8N9. It names a cell 2.56 m north to south and 3.42 m east to west, centred on 2°29'00.00"S, 43°07'59.96"W, 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
National park in northeastern Brazil, known for its rolling dunes and fresh water lagoons
Code
#9W79X-GF8N9
With a check character
#9W79X-GF8N9*D
Short form
GF8N9
Cell centre
-2.483332, -43.133322
Cell size
2.56 m by 3.42 m
Region
Maranhão
Country
Brazil

How to give this address

On a sign, a form or a delivery note

The whole code, #9W79X-GF8N9. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Maranhão

Lençóis Maranhenses National Park GF8N9: 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 Lençóis Maranhenses National Park. 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

#9W79X-GF8N9*D. 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. 9W79Metropolitan area40 km by 53.4 km
  2. 9W79XDistrict8 km by 10.7 km
  3. 9W79XGSuburb1.6 km by 2.14 km
  4. 9W79XGFA few streets320 m by 427 m
  5. 9W79XGF8Building64 m by 85.4 m
  6. 9W79XGF8NEntrance12.8 m by 17.1 m
  7. 9W79XGF8N9Doorway2.56 m by 3.42 m

More in Brazil

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