Belgrade

What the code says

The Grid Point Code for Belgrade is #J1W2G-99TM7. It names a cell 2.56 m north to south and 2.43 m east to west, centred on 44°48'14.44"N, 20°27'54.45"E, and it turns back into that cell on any phone or computer by arithmetic alone: no network, no account, no lookup table.

The point used is the one GeoNames records for Belgrade, near its centre, and Belgrade is the capital of Serbia.

Code

#J1W2G-99TM7

With a check character

#J1W2G-99TM7*G

Short form

99TM7

Cell centre

44.804010, 20.465126

Cell size

2.56 m by 2.43 m

Country

Serbia

Population

1,273,651

How to give this address

On a sign, a form or a delivery note

The whole code, #J1W2G-99TM7. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Serbia

Belgrade 99TM7: 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 3.8 km east or west of Belgrade. 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

#J1W2G-99TM7*G. 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 37.9 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. 2J1W2Metropolitan area40 km by 37.9 km
2. GJ1W2GDistrict8 km by 7.58 km
3. 9J1W2G9Suburb1.6 km by 1.52 km
4. 9J1W2G99A few streets320 m by 303 m
5. TJ1W2G99TBuilding64 m by 60.7 m
6. MJ1W2G99TMEntrance12.8 m by 12.1 m
7. 7J1W2G99TM7Doorway2.56 m by 2.43 m

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