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<div class="moz-cite-prefix">On 08/07/13 15:36, Daniel Kastl wrote:<br>
hi Daniel, Steve,<br>
<br>
I had a bit of play and came up with this <br>
<br>
map.png is the output of running <br>
shp2img -m demo.map<br>
<br>
The file demo.map is a mapserver file for creating the picture<br>
<br>
mktabl.sql is an sql script for making the tables<br>
<br>
and sql2tab.sql dumps the contents of route_table and vertexts
tables as source,target,cost setting<br>
<br>
One off the problems that I with the existing demo map is that
most of the costs of getting from a to b is always 1, this is
designed to be different.<br>
<br>
I any body can think of any improvements, please let me known<br>
<br>
Dave.<br>
</div>
<blockquote
cite="mid:CABXBSH_706dvjPESgTcEqwChDWmWDo1dTLJciGFSFwkEHTbXug@mail.gmail.com"
type="cite">
<div dir="ltr"><br>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Mon, Jul 8, 2013 at 10:27 PM, Dave
Potts <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:dave.potts@pinan.co.uk" target="_blank">dave.potts@pinan.co.uk</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im">On 08/07/13 14:27, Stephen Woodbridge
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
On 7/8/2013 5:59 AM, Dave Potts wrote:<br>
</blockquote>
<br>
</div>
hi Steve<br>
<br>
What bit of software was used to visualise the existing
network? Is it based on a screen shot from something like
mapserver?<br>
<br>
I for one am very great full to the vast amount of effort
that has been put in to version 2.0.</blockquote>
<div><br>
</div>
<div><br>
</div>
<div>Hi Steve,</div>
<div><br>
</div>
<div>With the sample data I was a bit lazy, I must admit.</div>
<div>Steve had this network image and a table, so I just
used it.</div>
<div><br>
</div>
<div>I know that it doesn't work so well for TSP and Driving
Distance. Some larger network would be better.</div>
<div>But then the SQL to copy and paste also becomes much
larger.</div>
<div><br>
</div>
<div>Well, I'm glad if someone could provide a better but
still simple sample network for the documentation. </div>
<div>It's not so easy to find something that covers all
algorithms and is still simple.</div>
<div>Right now it's still the better option than no sample
network ;-)</div>
<div><br>
</div>
<div>Daniel </div>
<div><br>
</div>
<div> </div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<span class="HOEnZb"><font color="#888888"><br>
<br>
Dave.</font></span>
<div class="HOEnZb">
<div class="h5"><br>
<br>
<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
hi List,<br>
<br>
Is it possible to rewrite the sample data network
to (<br>
<a moz-do-not-send="true"
href="http://docs.pgrouting.org/dev/doc/src/developer/sampledata.html#sampledata"
target="_blank">http://docs.pgrouting.org/dev/doc/src/developer/sampledata.html#sampledata</a>
<br>
)to include a more distinctive data sample?<br>
<br>
I have been trying to use it to provide an input
data sample for a TSP<br>
problem. I had problems because the current
network generates several<br>
routes that all look identical to the TSP so if
you attempt to do some<br>
topological work, you end up with several
identicial routes selections.<br>
<br>
For example the selection<br>
<br>
SELECT seq, id FROM
pgr_tsp('{{0,1,3,3},{1,0,2,2},{3,2,0,2},{3,2,2,0}}',X);<br>
<br>
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<br>
<br>
</blockquote>
<br>
Dave,<br>
<br>
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.<br>
<br>
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.<br>
<br>
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.<br>
<br>
Best regards,<br>
-Steve<br>
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-- <br>
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