Grid Point Code

Play

Baltimore

MarylandUnited States

With a code
#G364W-JDCFM
Said aloud
Baltimore JDCFM

Get the code for your door

What the code says

The Grid Point Code for Baltimore is #G364W-JDCFM. It names a cell 2.56 m north to south and 2.65 m east to west, centred on 39°17'25.36"N, 76°36'43.89"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 Baltimore, near its centre.

Code
#G364W-JDCFM
With a check character
#G364W-JDCFM*2
Short form
JDCFM
Cell centre
39.290377, -76.612193
Cell size
2.56 m by 2.65 m
Region
Maryland
Country
United States
Population
585,708

How to give this address

On a sign, a form or a delivery note

The whole code, #G364W-JDCFM. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Maryland

Baltimore JDCFM: 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 4.1 km east or west of Baltimore. 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

#G364W-JDCFM*2. 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 41.4 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. G364Metropolitan area40 km by 41.4 km
  2. G364WDistrict8 km by 8.27 km
  3. G364WJSuburb1.6 km by 1.65 km
  4. G364WJDA few streets320 m by 331 m
  5. G364WJDCBuilding64 m by 66.2 m
  6. G364WJDCFEntrance12.8 m by 13.2 m
  7. G364WJDCFMDoorway2.56 m by 2.65 m

More in United States

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