Jack Stringer wrote:
>>> Why do we cut them up for the bus routes? Wouldn't it be easier to build a
>>> navagation app at does the calculation using all the stops as waypoints.
>> The resulting calculated route might not actually match the route the bus
>> really takes.  You might argue that it doesn't matter so long as the bus
>> goes via all the stops, but IMHO it is wrong since there may be reasons for
>> knowing the route the bus actually takes rather than just what stops it goes
>> via.
> 
> I understand that people would like to put bus routes into OSM but
> does it have to require the cutting up of roundabouts and junctions? I
> would not go around cutting stuff up just so I can put in a route of
> ice cream van.

OSM's database can't hold all the information there is about 
everything. Among the many criteria for not including information are 
whether:
- the data is ephemeral
- it is better represented elsewhere
- it distorts the OSM database

Bus routes are on the edge of all of these.
Where I live routes are changed frequently (sadly often by being 
removed). Route and timetable information would ideally presented 
together (some routes operate only once a week).

There is likely to be a big increase in mash-up representations with 
OSM data as just one of the layers. Public transport information is 
ripe for innovative interactive presentation along these lines. I 
would prefer to wait the short time until this happens rather than 
distorting the OSM data unnecessarily.

Chris




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