Generate complex cones and "horse saddles"

[ghost]

The model should allow to generate several different forms of geographical time-space, with choice given to the user

• simple cone: basic slope of cone is given by slowest road mode (regular road circa 80 kph or motorway 100 kph); this for has a symetry of revolution
• complex cone : other terrestrial transport mode edges in the network may deform locally the slope of the cone until the new slope: e.g. 250 kph high speed train line will deform the cone shape so that the ratio 7.5 will be deformed to 3 along the HST line; the user should decide whether she or he wants to allow a given transport mode to deform the surface, because then it means assuming the transport system is spatially continuously accessible; questionable for expressway or HST.
• horse saddle more complex forms should also be developed like the proposed horse "saddle", that we can't decently call a complex cone; the basic structure will be simple cones of a slow speed transport mode completed by a structure based on a different (faster) transport mode

proposed drawing here.

[ghost]

I have asked Jules to draw sketches of what I have in mind.

[alainlhostis]

Three cone drawing model have been implemented:

• simple, based on road

• simple, based on fastest terrestrial mode

• complex