Grid Point Code
Source on GitHub

Play

Kariakoo

Dar es SalaamDar es Salaam RegionTanzania

Grid Point Code for Kariakoo
Without a code
Kariakoo, Dar es Salaam, and then directions
With a code
#816M0-9806J
Said aloud
Kariakoo 9806J

This code is one spot in Kariakoo, a cell 2.56 m by 3.40 m. Every stall front and doorway in it has a code of its own.

Get the code for your door

What the code says

The Grid Point Code for Kariakoo is #816M0-9806J. It names a cell 2.56 m north to south and 3.40 m east to west, centred on 6°49'11.96"S, 39°16'33.59"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
Ward of Tanzania
Code
#816M0-9806J
With a check character
#816M0-9806J*9
Short form
9806J
Cell centre
-6.819990, 39.275996
Cell size
2.56 m by 3.40 m
City
Dar es Salaam
Region
Dar es Salaam Region
Country
Tanzania

How to give this address

On a sign, a form or a delivery note

The whole code, #816M0-9806J. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Dar es Salaam

Kariakoo 9806J: 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 5.3 km east or west of Kariakoo. 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

#816M0-9806J*9. 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 53.1 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. 816MMetropolitan area40 km by 53.1 km
  2. 816M0District8 km by 10.6 km
  3. 816M09Suburb1.6 km by 2.12 km
  4. 816M098A few streets320 m by 424 m
  5. 816M0980Building64 m by 84.9 m
  6. 816M09806Entrance12.8 m by 17 m
  7. 816M09806JDoorway2.56 m by 3.4 m

More in Tanzania

Place and region from Wikidata, described on Wikipedia; city from GeoNames, under CC BY 4.0.