Madison
WisconsinUnited States
- With a code
#G271M-6RTJ3- Said aloud
- Madison
6RTJ3
What the code says
The Grid Point Code for Madison is #G271M-6RTJ3. It names a cell 2.56 m north to south and 2.50 m east to west, centred on 43°04'23.02"N, 89°24'04.45"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 Madison, near its centre.
- Code
#G271M-6RTJ3- With a check character
#G271M-6RTJ3*5- Short form
6RTJ3- Cell centre
- 43.073061, -89.401236
- Cell size
- 2.56 m by 2.50 m
- Region
- Wisconsin
- Country
- United States
- Population
- 280,305
How to give this address
- On a sign, a form or a delivery note
The whole code,
#G271M-6RTJ3. It needs nothing else: no city, no street, no network to read it back.- Said aloud, in Wisconsin
Madison 6RTJ3: 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 3.9 km east or west of Madison. 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
#G271M-6RTJ3*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 39 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.
- G271Metropolitan area40 km by 39 km
- G271MDistrict8 km by 7.81 km
- G271M6Suburb1.6 km by 1.56 km
- G271M6RA few streets320 m by 312 m
- G271M6RTBuilding64 m by 62.5 m
- G271M6RTJEntrance12.8 m by 12.5 m
- G271M6RTJ3Doorway2.56 m by 2.5 m
More in United States
City, region and population from GeoNames, under CC BY 4.0.