Coiba

What the code says

The Grid Point Code for Coiba is #GWP4K-PC71H. It names a cell 2.56 m north to south and 3.39 m east to west, centred on 7°28'47.98"N, 81°47'23.96"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

Island and national park in Panama

Code

#GWP4K-PC71H

With a check character

#GWP4K-PC71H*4

Short form

PC71H

Cell centre

7.479994, -81.789988

Cell size

2.56 m by 3.39 m

Region

Veraguas Province

Country

Panama

How to give this address

On a sign, a form or a delivery note

The whole code, #GWP4K-PC71H. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Veraguas Province

Coiba PC71H: 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 Coiba. 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

#GWP4K-PC71H*4. 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 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. 4GWP4Metropolitan area40 km by 53 km
2. KGWP4KDistrict8 km by 10.6 km
3. PGWP4KPSuburb1.6 km by 2.12 km
4. CGWP4KPCA few streets320 m by 424 m
5. 7GWP4KPC7Building64 m by 84.8 m
6. 1GWP4KPC71Entrance12.8 m by 17 m
7. HGWP4KPC71HDoorway2.56 m by 3.39 m

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