Prometheus Cave Natural Monument

What the code says

The Grid Point Code for Prometheus Cave Natural Monument is #J3LD8-G34TN. It names a cell 2.56 m north to south and 2.53 m east to west, centred on 42°22'36.70"N, 42°36'01.85"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

Solutional show cave near Kumistavi in Tsqaltubo Municipality, Georgia

Code

#J3LD8-G34TN

With a check character

#J3LD8-G34TN*F

Short form

G34TN

Cell centre

42.376861, 42.600515

Cell size

2.56 m by 2.53 m

Region

Imereti

Country

Georgia

How to give this address

On a sign, a form or a delivery note

The whole code, #J3LD8-G34TN. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Imereti

Prometheus Cave Natural Monument G34TN: 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 Prometheus Cave Natural Monument. 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

#J3LD8-G34TN*F. 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 39.5 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. DJ3LDMetropolitan area40 km by 39.5 km
2. 8J3LD8District8 km by 7.89 km
3. GJ3LD8GSuburb1.6 km by 1.58 km
4. 3J3LD8G3A few streets320 m by 316 m
5. 4J3LD8G34Building64 m by 63.2 m
6. TJ3LD8G34TEntrance12.8 m by 12.6 m
7. NJ3LD8G34TNDoorway2.56 m by 2.53 m

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