Grid Point Code

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Greenmarket Square

Cape TownWestern CapeSouth Africa

Without a code
Greenmarket Square, Cape Town, and then directions
With a code
#8K716-X8NM9
Said aloud
Greenmarket Square X8NM9

This code is one spot in Greenmarket Square, a cell 2.56 m by 2.84 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 Greenmarket Square is #8K716-X8NM9. It names a cell 2.56 m north to south and 2.84 m east to west, centred on 33°55'22.06"S, 18°25'12.01"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
Place in Western Cape, South Africa
Code
#8K716-X8NM9
With a check character
#8K716-X8NM9*9
Short form
X8NM9
Cell centre
-33.922794, 18.420004
Cell size
2.56 m by 2.84 m
City
Cape Town
Region
Western Cape
Country
South Africa

How to give this address

On a sign, a form or a delivery note

The whole code, #8K716-X8NM9. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Cape Town

Greenmarket Square X8NM9: 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 4.4 km east or west of Greenmarket Square. 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

#8K716-X8NM9*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 44.3 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. 8K71Metropolitan area40 km by 44.3 km
  2. 8K716District8 km by 8.87 km
  3. 8K716XSuburb1.6 km by 1.77 km
  4. 8K716X8A few streets320 m by 355 m
  5. 8K716X8NBuilding64 m by 70.9 m
  6. 8K716X8NMEntrance12.8 m by 14.2 m
  7. 8K716X8NM9Doorway2.56 m by 2.84 m

More in South Africa

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