Lake Atitlán

What the code says

The Grid Point Code for Lake Atitlán is #GL7P0-0P0P0. It names a cell 2.56 m north to south and 3.31 m east to west, centred on 14°41'59.97"N, 91°11'59.95"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

Crater lake in the Western Highlands of Guatemala

Code

#GL7P0-0P0P0

With a check character

#GL7P0-0P0P0*7

Short form

0P0P0

Cell centre

14.699992, -91.199985

Cell size

2.56 m by 3.31 m

Region

Sololá Department

Country

Guatemala

How to give this address

On a sign, a form or a delivery note

The whole code, #GL7P0-0P0P0. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Sololá Department

Lake Atitlán 0P0P0: 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 5.2 km east or west of Lake Atitlán. 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

#GL7P0-0P0P0*7. 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 51.7 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. PGL7PMetropolitan area40 km by 51.7 km
2. 0GL7P0District8 km by 10.3 km
3. 0GL7P00Suburb1.6 km by 2.07 km
4. PGL7P00PA few streets320 m by 413 m
5. 0GL7P00P0Building64 m by 82.7 m
6. PGL7P00P0PEntrance12.8 m by 16.5 m
7. 0GL7P00P0P0Doorway2.56 m by 3.31 m

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• Guatemala City
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