Vjetrenica Cave

What the code says

The Grid Point Code for Vjetrenica Cave is #J1LT2-1G1T6. It names a cell 2.56 m north to south and 2.51 m east to west, centred on 42°50'45.03"N, 17°59'02.05"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

Cave in Bosnia and Herzegovina

Code

#J1LT2-1G1T6

With a check character

#J1LT2-1G1T6*R

Short form

1G1T6

Cell centre

42.845841, 17.983903

Cell size

2.56 m by 2.51 m

Region

Federation of Bosnia and Herzegovina

Country

Bosnia and Herzegovina

How to give this address

On a sign, a form or a delivery note

The whole code, #J1LT2-1G1T6. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Federation of Bosnia and Herzegovina

Vjetrenica Cave 1G1T6: 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 3.9 km east or west of Vjetrenica 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

#J1LT2-1G1T6*R. 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 39.2 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. TJ1LTMetropolitan area40 km by 39.2 km
2. 2J1LT2District8 km by 7.84 km
3. 1J1LT21Suburb1.6 km by 1.57 km
4. GJ1LT21GA few streets320 m by 313 m
5. 1J1LT21G1Building64 m by 62.7 m
6. TJ1LT21G1TEntrance12.8 m by 12.5 m
7. 6J1LT21G1T6Doorway2.56 m by 2.51 m

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