[OSM-dev] Unwayed segments

Robert (Jamie) Munro rjmunro at arjam.net
Thu May 10 12:45:02 BST 2007


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Doru-Julian Bugariu wrote:
> Frederik Ramm schrieb:
> 
>> If everyone thinks that a "FIXME" way is better than no way at all,  
>> one could also go over the planet file with a script and create ways  
>> for everything that doesn't already have one, automatically grouping  
>> connected segments into "FIXME" ways.
> 
> Please do NOT do such a thing. I'm drawing segments where I know a way
> is (gps data collected the last few years) but I don't make ways out of
> them until I know the name of the street and which tags are appropriate.
> This may take some weeks or even months, depending on how many time I have.
> 
> Meanwhile other people may be able to finish the work I started (make
> ways out of existing segments, add additional tags and so on). I think
> that *is* the whole idea behind OSM: many people working *together* to
> create "the map".
> 
> I'm afraid that if anyone starts to delete hundreds our thousands of
> unwayed segments some people might get very upset/angry and even leave
> the project.

I absolutely agree with this. I have added a lot of segments from
unknown GPS data (probably from the ASTL dataset), but not turned them
into ways because I have no information at all relevant. I don't know if
a turn is the vehicle changing roads, or if it is a bend in the current
road. I don't even know if a straight line is one road or many. I don't
know if the roads are one way, what they are called or /anything/.

Sometimes you can see that they are dual carriageway as the gps track
cluster into two separate lanes very clearly. It would be nice if it
were possible to tell which way a vehicle was travelling in JOSM when
you download a GPS track - it would enable us to guess one-ways. I'm not
sure if we can determine this from the ASTL data easily or not.

I think the best solution is for Potlatch to download the segments, and
 auto-way them tways plugin style, but only save it as a way if it is
edited by the user.

Robert (Jamie) Munro


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