[GRASS-user] how to do public transport isochrone maps (with OSM data)?

[Moritz Lennert]

On 24/02/15 01:24, image93 wrote:
> Hello,
>
> Two months ago, i tried to do drive isochrone with the new plugin called
> "v.isochrones".
>
> Now, i w'd like to do public transport isochrone map with grass. is it
> possible to have an idea of the processing steps? what kind of input data
> must be supplied ? What grass modules should be used?
>

There is v.net.timetable that allows you to find a shortest path using 
public transport timetables. I imagine that it should be possible to use 
the process to also write a "v.net.isotimetables", but someone would 
have to program that.

A rewrite of v.isochrones is on my todo list (actually mostly done on my 
machine). The current implementation uses r.cost, but I've used another 
approach combining v.net.iso and r.grow.distance that also gives 
interesting results. The new version will also include the option to 
create individual isochrone maps from a series of starting points. But I 
don't know when I will find the time to actually put everything in a 
state where I can upload it to addons...

Moritz