Grid Point Code

Play

Istanbul

Turkey

With a code
#J2F93-L10C3
Said aloud
Istanbul L10C3

Get the code for your door

What the code says

The Grid Point Code for Istanbul is #J2F93-L10C3. It names a cell 2.56 m north to south and 2.58 m east to west, centred on 41°00'49.82"N, 28°56'58.75"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 Istanbul, near its centre.

Code
#J2F93-L10C3
With a check character
#J2F93-L10C3*5
Short form
L10C3
Cell centre
41.013838, 28.949652
Cell size
2.56 m by 2.58 m
Country
Turkey
Population
15,701,602

How to give this address

On a sign, a form or a delivery note

The whole code, #J2F93-L10C3. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Turkey

Istanbul L10C3: 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 4.0 km east or west of Istanbul. 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

#J2F93-L10C3*5. 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 40.3 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. J2F9Metropolitan area40 km by 40.3 km
  2. J2F93District8 km by 8.06 km
  3. J2F93LSuburb1.6 km by 1.61 km
  4. J2F93L1A few streets320 m by 323 m
  5. J2F93L10Building64 m by 64.5 m
  6. J2F93L10CEntrance12.8 m by 12.9 m
  7. J2F93L10C3Doorway2.56 m by 2.58 m

More in Turkey

City, region and population from GeoNames, under CC BY 4.0.