Baradla Cave

What the code says

The Grid Point Code for Baradla Cave is #PW826-72GMP. It names a cell 2.56 m north to south and 2.27 m east to west, centred on 48°28'18.38"N, 20°29'43.17"E, 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

Hungarian cave

Code

#PW826-72GMP

With a check character

#PW826-72GMP*T

Short form

72GMP

Cell centre

48.471771, 20.495324

Cell size

2.56 m by 2.27 m

Region

Borsod-Abaúj-Zemplén County

Country

Hungary

How to give this address

On a sign, a form or a delivery note

The whole code, #PW826-72GMP. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Borsod-Abaúj-Zemplén County

Baradla Cave 72GMP: 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 3.5 km east or west of Baradla Cave. 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

#PW826-72GMP*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 35.4 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.

1. 2PW82Metropolitan area40 km by 35.4 km
2. 6PW826District8 km by 7.09 km
3. 7PW8267Suburb1.6 km by 1.42 km
4. 2PW82672A few streets320 m by 283 m
5. GPW82672GBuilding64 m by 56.7 m
6. MPW82672GMEntrance12.8 m by 11.3 m
7. PPW82672GMPDoorway2.56 m by 2.27 m

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