Grid Point Code

Play

Giant's Causeway

near PortrushNorthern IrelandUnited Kingdom

With a code
#R92MF-90WK1
Said aloud
Giant's Causeway 90WK1

Open in the playground

What the code says

The Grid Point Code for Giant's Causeway is #R92MF-90WK1. It names a cell 2.56 m north to south and 1.95 m east to west, centred on 55°14'26.99"N, 6°30'42.02"W, 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
Rock formation on the Antrim coast of Northern Ireland
Code
#R92MF-90WK1
With a check character
#R92MF-90WK1*L
Short form
90WK1
Cell centre
55.240831, -6.511672
Cell size
2.56 m by 1.95 m
Region
Northern Ireland
Country
United Kingdom

How to give this address

On a sign, a form or a delivery note

The whole code, #R92MF-90WK1. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Northern Ireland

Giant's Causeway 90WK1: 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 3.0 km east or west of Giant's Causeway. 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

#R92MF-90WK1*L. 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 30.5 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. R92MMetropolitan area40 km by 30.5 km
  2. R92MFDistrict8 km by 6.09 km
  3. R92MF9Suburb1.6 km by 1.22 km
  4. R92MF90A few streets320 m by 244 m
  5. R92MF90WBuilding64 m by 48.7 m
  6. R92MF90WKEntrance12.8 m by 9.75 m
  7. R92MF90WK1Doorway2.56 m by 1.95 m

More in United Kingdom

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