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

Stephen Woodbridge woodbri at swoodbridge.com
Mon Jul 8 06:33:23 PDT 2013


On 7/8/2013 9:27 AM, Dave Potts wrote:
> 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?

Yes, I used the stuff at tools/mapserver/
I you set the extents correctly in the mapfile then you can generate the 
image with shp2img -m yourmapfile.map -o output.png

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

Thanks, there are an amazing large number of little things to track down 
and get working. I'm so glad I made the test suite up front that has 
really helped with checking for regressions. I also want to thank you 
and all the other users that have taken the time to test things out and 
report issues and successes.

Thanks,
   -Steve

> 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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