Grid Point Code

Play

Macapá

AmapáBrazil

With a code
#H03W3-CMFGF
Said aloud
Macapá CMFGF

Get the code for your door

What the code says

The Grid Point Code for Macapá is #H03W3-CMFGF. It names a cell 2.56 m north to south and 3.42 m east to west, centred on 0°02'19.97"N, 51°03'59.02"W, 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 Macapá, near its centre.

Code
#H03W3-CMFGF
With a check character
#H03W3-CMFGF*G
Short form
CMFGF
Cell centre
0.038880, -51.066394
Cell size
2.56 m by 3.42 m
Region
Amapá
Country
Brazil
Population
512,902

How to give this address

On a sign, a form or a delivery note

The whole code, #H03W3-CMFGF. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Amapá

Macapá CMFGF: 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 Macapá. 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

#H03W3-CMFGF*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 53.4 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. H03WMetropolitan area40 km by 53.4 km
  2. H03W3District8 km by 10.7 km
  3. H03W3CSuburb1.6 km by 2.14 km
  4. H03W3CMA few streets320 m by 427 m
  5. H03W3CMFBuilding64 m by 85.5 m
  6. H03W3CMFGEntrance12.8 m by 17.1 m
  7. H03W3CMFGFDoorway2.56 m by 3.42 m

More in Brazil

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