Boston
MassachusettsUnited States
- With a code
#G49GN-6C91M- Said aloud
- Boston
6C91M
What the code says
The Grid Point Code for Boston is #G49GN-6C91M. It names a cell 2.56 m north to south and 2.53 m east to west, centred on 42°21'30.34"N, 71°03'35.16"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 Boston, near its centre.
- Code
#G49GN-6C91M- With a check character
#G49GN-6C91M*R- Short form
6C91M- Cell centre
- 42.358429, -71.059768
- Cell size
- 2.56 m by 2.53 m
- Region
- Massachusetts
- Country
- United States
- Population
- 653,833
How to give this address
- On a sign, a form or a delivery note
The whole code,
#G49GN-6C91M. It needs nothing else: no city, no street, no network to read it back.- Said aloud, in Massachusetts
Boston 6C91M: 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 Boston. 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
#G49GN-6C91M*R. 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 39.5 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.
- G49GMetropolitan area40 km by 39.5 km
- G49GNDistrict8 km by 7.9 km
- G49GN6Suburb1.6 km by 1.58 km
- G49GN6CA few streets320 m by 316 m
- G49GN6C9Building64 m by 63.2 m
- G49GN6C91Entrance12.8 m by 12.6 m
- G49GN6C91MDoorway2.56 m by 2.53 m
More in United States
City, region and population from GeoNames, under CC BY 4.0.