Grid Point Code

Play

Mercado de São José

RecifeBrazil

Without a code
Mercado de São José, Recife, and then directions
With a code
#9T4FG-W7G38
Said aloud
Mercado de São José W7G38

This code is one spot in Mercado de São José, a cell 2.56 m by 3.39 m. Every stall front and doorway in it has a code of its own.

Get the code for your door

What the code says

The Grid Point Code for Mercado de São José is #9T4FG-W7G38. It names a cell 2.56 m north to south and 3.39 m east to west, centred on 8°04'06.70"S, 34°52'39.69"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
Historic site
Code
#9T4FG-W7G38
With a check character
#9T4FG-W7G38*T
Short form
W7G38
Cell centre
-8.068527, -34.877691
Cell size
2.56 m by 3.39 m
City
Recife
Region
Recife
Country
Brazil

How to give this address

On a sign, a form or a delivery note

The whole code, #9T4FG-W7G38. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Recife

Mercado de São José W7G38: 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 Mercado de São José. 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

#9T4FG-W7G38*T. 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 52.9 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. 9T4FMetropolitan area40 km by 52.9 km
  2. 9T4FGDistrict8 km by 10.6 km
  3. 9T4FGWSuburb1.6 km by 2.12 km
  4. 9T4FGW7A few streets320 m by 423 m
  5. 9T4FGW7GBuilding64 m by 84.6 m
  6. 9T4FGW7G3Entrance12.8 m by 16.9 m
  7. 9T4FGW7G38Doorway2.56 m by 3.39 m

More in Brazil

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