Quito

PichinchaEcuador

With a code: #C1TWL-P0345
Said aloud: Quito P0345

What the code says

The Grid Point Code for Quito is #C1TWL-P0345. It names a cell 2.56 m north to south and 3.42 m east to west, centred on 0°13'47.49"S, 78°31'29.79"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 Quito, near its centre, and Quito is the capital of Ecuador.

Code: #C1TWL-P0345
With a check character: #C1TWL-P0345*D
Short form: P0345
Cell centre: -0.229859, -78.524943
Cell size: 2.56 m by 3.42 m
Region: Pichincha
Country: Ecuador
Population: 2,781,641

How to give this address

On a sign, a form or a delivery note: The whole code, #C1TWL-P0345. It needs nothing else: no city, no street, no network to read it back.
Said aloud, in Pichincha: Quito P0345: 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 Quito. 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: #C1TWL-P0345*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.

C1TWMetropolitan area40 km by 53.4 km
C1TWLDistrict8 km by 10.7 km
C1TWLPSuburb1.6 km by 2.14 km
C1TWLP0A few streets320 m by 427 m
C1TWLP03Building64 m by 85.5 m
C1TWLP034Entrance12.8 m by 17.1 m
C1TWLP0345Doorway2.56 m by 3.42 m

More in Ecuador

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