Grid Point Code

Play

Reading Terminal Market

PhiladelphiaPennsylvaniaUnited States

Without a code
Reading Terminal Market, Philadelphia, and then directions
With a code
#G3GWT-PFMDL
Said aloud
Reading Terminal Market PFMDL

This code is one spot in Reading Terminal Market, a cell 2.56 m by 2.62 m. Every stall front and doorway in it has a code of its own.

Get the code for your door

What the code says

The Grid Point Code for Reading Terminal Market is #G3GWT-PFMDL. It names a cell 2.56 m north to south and 2.62 m east to west, centred on 39°57'12.24"N, 75°09'32.45"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
Farmer's market in Philadelphia
Code
#G3GWT-PFMDL
With a check character
#G3GWT-PFMDL*M
Short form
PFMDL
Cell centre
39.953399, -75.159014
Cell size
2.56 m by 2.62 m
City
Philadelphia
Region
Pennsylvania
Country
United States

How to give this address

On a sign, a form or a delivery note

The whole code, #G3GWT-PFMDL. It needs nothing else: no city, no street, no network to read it back.

Said aloud, in Philadelphia

Reading Terminal Market PFMDL: 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 Reading Terminal Market. 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

#G3GWT-PFMDL*M. 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 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. G3GWMetropolitan area40 km by 41 km
  2. G3GWTDistrict8 km by 8.19 km
  3. G3GWTPSuburb1.6 km by 1.64 km
  4. G3GWTPFA few streets320 m by 328 m
  5. G3GWTPFMBuilding64 m by 65.5 m
  6. G3GWTPFMDEntrance12.8 m by 13.1 m
  7. G3GWTPFMDLDoorway2.56 m by 2.62 m

More in United States

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