Grid Point Code

Play

Iguazu Falls

near Foz do IguaçuParanáBrazil

With a code
#9H2K7-4KR0M
Said aloud
Iguazu Falls 4KR0M

Open in the playground

What the code says

The Grid Point Code for Iguazu Falls is #9H2K7-4KR0M. It names a cell 2.56 m north to south and 3.08 m east to west, centred on 25°41'43.00"S, 54°26'11.95"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
Waterfalls on the Igazú River on the border of Misiones, Argentina and Paraná, Brazil
Code
#9H2K7-4KR0M
With a check character
#9H2K7-4KR0M*3
Short form
4KR0M
Cell centre
-25.695279, -54.436654
Cell size
2.56 m by 3.08 m
Region
Paraná
Country
Brazil

How to give this address

On a sign, a form or a delivery note

The whole code, #9H2K7-4KR0M. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Paraná

Iguazu Falls 4KR0M: 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 4.8 km east or west of Iguazu Falls. 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

#9H2K7-4KR0M*3. 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 48.1 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. 9H2KMetropolitan area40 km by 48.1 km
  2. 9H2K7District8 km by 9.63 km
  3. 9H2K74Suburb1.6 km by 1.93 km
  4. 9H2K74KA few streets320 m by 385 m
  5. 9H2K74KRBuilding64 m by 77 m
  6. 9H2K74KR0Entrance12.8 m by 15.4 m
  7. 9H2K74KR0MDoorway2.56 m by 3.08 m

More in Brazil

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