Mayon

What the code says

The Grid Point Code for Mayon is #LNG7W-15R49. It names a cell 2.56 m north to south and 3.33 m east to west, centred on 13°15'24.03"N, 123°41'06.01"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

Volcano in the Philippines

Code

#LNG7W-15R49

With a check character

#LNG7W-15R49*7

Short form

15R49

Cell centre

13.256675, 123.685002

Cell size

2.56 m by 3.33 m

Region

Bicol Region

Country

Philippines

How to give this address

On a sign, a form or a delivery note

The whole code, #LNG7W-15R49. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Bicol Region

Mayon 15R49: 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 Mayon. 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

#LNG7W-15R49*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 52 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. 7LNG7Metropolitan area40 km by 52 km
2. WLNG7WDistrict8 km by 10.4 km
3. 1LNG7W1Suburb1.6 km by 2.08 km
4. 5LNG7W15A few streets320 m by 416 m
5. RLNG7W15RBuilding64 m by 83.2 m
6. 4LNG7W15R4Entrance12.8 m by 16.6 m
7. 9LNG7W15R49Doorway2.56 m by 3.33 m

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