[pgrouting-dev] http://docs.pgrouting.org/dev/doc/src/developer/sampledata.html#sampledata

[Dave Potts]

On 08/07/13 14:27, Stephen Woodbridge wrote:
> On 7/8/2013 5:59 AM, Dave Potts wrote:

hi Steve

What bit of software was used to visualise the existing network?  Is it 
based on a screen shot from something like  mapserver?

I for one am very great full to the vast amount of effort that has been 
put in to version  2.0.

Dave.



>> hi List,
>>
>> Is it possible to rewrite the sample data network to (
>> http://docs.pgrouting.org/dev/doc/src/developer/sampledata.html#sampledata 
>>
>> )to include a more distinctive data sample?
>>
>> I have been trying to use it to provide an input data sample for a TSP
>> problem.  I had problems because the current network generates several
>> routes that all look identical to the TSP so if you attempt to do some
>> topological work, you end up with several identicial routes selections.
>>
>> For example the selection
>>
>> SELECT  seq,  id  FROM 
>> pgr_tsp('{{0,1,3,3},{1,0,2,2},{3,2,0,2},{3,2,2,0}}',X);
>>
>> where x  is in the range 0-3 will generate 4 paths of which the 
>> profile is two routes of 121 or 212 measured in distance unit terms
>>
>
> Dave,
>
> Daniel was trying to use one sample data for all the examples and in 
> general this as worked well for most of the examples where we are 
> computing simple routes. I think the driving distance and tsp examples 
> probably need to have a slightly larger graph too adequately 
> demonstrate the function.
>
> If you have another graph that you think might be more appropriate for 
> demonstrating both of these commands commands I think there is room 
> for it. I know Daniel and I are both tied up at the moment on funded 
> project work at the moment, but it you were inclined to make an 
> additional sample graph and update the docs we would love to get a 
> pull request to help out the release.
>
> We have put a lot of effort into having complete documentation 
> coverage of all the functions in 2.0. We still have some work to do 
> but this is an area that we would be happy to get help on. If you 
> don't have time to do this at least open a ticket so it gets tracked.
>
> Best regards,
>   -Steve
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