Álvaro Obregón

Mexico CityMexico

With a code: #GD36K-WN90R
Said aloud: Álvaro Obregón WN90R

What the code says

The Grid Point Code for Álvaro Obregón is #GD36K-WN90R. It names a cell 2.56 m north to south and 3.23 m east to west, centred on 19°21'31.25"N, 99°12'11.82"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 Álvaro Obregón, near its centre.

Code: #GD36K-WN90R
With a check character: #GD36K-WN90R*T
Short form: WN90R
Cell centre: 19.358680, -99.203282
Cell size: 2.56 m by 3.23 m
Region: Mexico City
Country: Mexico
Population: 726,664

How to give this address

On a sign, a form or a delivery note: The whole code, #GD36K-WN90R. It needs nothing else: no city, no street, no network to read it back.
Said aloud, in Mexico City: Álvaro Obregón WN90R: 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 5.0 km east or west of Álvaro Obregón. 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: #GD36K-WN90R*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 50.4 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.

GD36Metropolitan area40 km by 50.4 km
GD36KDistrict8 km by 10.1 km
GD36KWSuburb1.6 km by 2.02 km
GD36KWNA few streets320 m by 403 m
GD36KWN9Building64 m by 80.7 m
GD36KWN90Entrance12.8 m by 16.1 m
GD36KWN90RDoorway2.56 m by 3.23 m

More in Mexico

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