Grid Point Code

Play

Chihuahua

Mexico

With a code
#G84RC-JFRTX
Said aloud
Chihuahua JFRTX

Get the code for your door

What the code says

The Grid Point Code for Chihuahua is #G84RC-JFRTX. It names a cell 2.56 m north to south and 3.00 m east to west, centred on 28°38'06.99"N, 106°05'20.01"W, 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 Chihuahua, near its centre.

Code
#G84RC-JFRTX
With a check character
#G84RC-JFRTX*T
Short form
JFRTX
Cell centre
28.635276, -106.088893
Cell size
2.56 m by 3.00 m
Country
Mexico
Population
925,762

How to give this address

On a sign, a form or a delivery note

The whole code, #G84RC-JFRTX. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Mexico

Chihuahua JFRTX: 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 4.7 km east or west of Chihuahua. 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

#G84RC-JFRTX*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 46.9 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. G84RMetropolitan area40 km by 46.9 km
  2. G84RCDistrict8 km by 9.38 km
  3. G84RCJSuburb1.6 km by 1.88 km
  4. G84RCJFA few streets320 m by 375 m
  5. G84RCJFRBuilding64 m by 75 m
  6. G84RCJFRTEntrance12.8 m by 15 m
  7. G84RCJFRTXDoorway2.56 m by 3 m

More in Mexico

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