.                       - first concept -

Cairo metro with logical station codes, compatible to www.volksnav.com/cairo . For better overview, station names are omitted 

Another example Tokyo Metro

 

      Legend: 

Normal format for position codes:      

     StatusQuo(c) Cairo m5:13 r237

m... = horizon hour,

letter "m" comes from Munich Orientation Convention
m12 = north direction

m3 = east, m6 = south etc. 
 ... :13 horizon minutes = 13 x 100 meters "later"
r...

radius in steps of  100 meters / 100 yards / 1 block of houses

Simplified format without "minutes":   m5: r237

------

via m2 = through sector m2

 

Signage: 

StatusQuo© addresses will be indicated on so-called Orientators©, the signage of the future: 

Vertical Pointing©: additional to the position information, a round symbol called center or pole pointer will be placed on their periphery to allow to detect the direction m0  according to the following conventions: 

 o

            Orientator©

 
if the pointer is placed on top m0 will be in front of you / f12
  on bottom   behind / f6
  right hand   right hand / f3

etc. Acc. to the same convention, a square symbol points to north = m12. 

The picture above reveils: m12 is behind/f6, the pole is ahead/f1 . 

 

Navigation / VolksNav©:

The local navigation with the help of such codes is called VolksNav©. As proceeded today with house numbers, VolksNav© is nothing else than the major/minor comparison between "r" and "m" values: 

Simply proceed according to 1 -2 -3 : 

1 - 

Positioning

 

  

Turn your body until m0 will be BEHIND. In this position, 

ahead will be outwards
right hand " to later (clockwise)
left hand " to earlier

etc. 

Beginners have to turn physically, after some exercises anyone will be able to do this by his imagination power. In case you look at above shown Orientator©, you'd have to turn to left, correct? 
2 - 

r-comparison

 

Ask yourself:         

must I move inwards or outwards? 

 ( = is the target radius greater or smaller than the actual one?)
3 - 

m-comparison

 

Ask yourself:      

must I move to “later” (clockwise) or to earlier?  

( = is the target m later or earlier than the actual one?)