The circle r100

This site shall demonstrate the difference between actual maps and those which simply include the circle called r100.

r100 is a radius circle around an urban pole called "r0", in this case the TV tower.

This radius can be 100 blocksOfHouses / 10 km / 100 x 100 yards.


Line logos:

With this, logos for metro lines, busses etc. can be formed, see examples Tokyo Metro, London Tube:


Better maps:

r100 also compensates the distortion on simplified network maps:

Location Codes:

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 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.

It is suggested to make the following exercises by imagination:

1) Where are the following locations?:

m3 r50

imaginary interpolation

m5 r150 imaginary extrapolation ( Remark: address outside of the map !! )

2) read the code by imagination

What's the location code of the above mentioned point "here" ?


Besides: imaginary clocks help to avoid confusions



It is proposed that this circle should become a standard for fast orientation purposes.



Just one more convention for horizon "minutes" allows to form codes for crossings, stations, stop points, bridges, tunnels etc., see MagicGrid