This site shall demonstrate the big difference between actual maps and those which simply include a circle called r100.
r100 is a circle around an urban pole called "r0" (or "m0" if you prefer), in this case the Marienplatz.
This radius can be 100 blocksOfHouses / 10 km / 100 x 100 yards.
With this, logos for metro lines, busses etc. can be formed, see examples Tokyo Metro, London Tube:
This innovation allows to form urban location codes as an alternative to "here", post codes, lat/lon or alternatives .
Such codes base on the following Munich Orientation Convention for imaginary clocks:
m12 = direction from r0/m0 to north,
m3 = to sunrise,
m6 to south
etc. The 12 main directions are also called "horizon hours" and this method divides the city like a cake into 12 "hour" sectors.
Turn your imagination on and make the following exercises:
Where are the following locations?:
|m5 r150||imaginary extrapolation|
2) read the code by imagination
What's the location code of the actual address "here" ?
It is proposed that this circle should become a standard for fast orientation purposes.
Subdivision of the horizon hours:
Just one more Convention for horizon "minutes" allows to form codes for crossings, stations, stop points, bridges, tunnels etc., see MagicGrid