[OSRM-talk] adding way id and direction to output

[Jens Thiele]

Robert Scott <lists at humanleg.org.uk> writes:

> On Thursday 25 April 2013, Jens Thiele wrote:
>> Hi,
>> 
>> i want to add way id and direction (forward/backward) to the routing
>> output
>> 
>> to add the way id a simple hack is to use the id as name in the lua
>> profile
>
> Heh - I've needed the same thing and have done it similarly, only
> directly in the source rather than in lua (the original patches were
> written before all this lua fanciness was around). See my "tsbp"
> branch which includes all my needed hacks in this vein:
>
> https://github.com/risicle/Project-OSRM/tree/tsbp
>
> (it's a little behind osrm proper but not tremendously)

ok

>> adding the direction (forward/backward) on each way seems extremely
>> hard
>
> I am going to have to do something similar in the future so will be
> interested to see how this pans out. Ideally I would like a
> PhantomNode (which I can use to initiate a search with) that has a
> "direction" flag, positive or negative. Alternatively a way of
> discovering the "direction" a destination PhantomNode is reached from
> by a routing result would allow me to do some useful calculations.
>
> But this is as far as I've researched this subject so far.

as i failed to keep track of the swaps another hack would be to just
split every way into 2 oneways and then encoding the id and direction in
the name :(

but probably start and end of route will need extra care

as additional motiviation for the whole thing:
it would allow to solve many output problems easily
for example the cost vs time(s) thing

btw:
ideally one wouldn't need the hack and also could hijack the hierarchy
to prefold output values (one could also partially precompute
douglas-peucker for the higher levels geometry)
as far as i understand only weight is folded in the higher levels

so much to do, so little time