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<div class="moz-cite-prefix">With a bit of Python you can automate
routing tasks in any of these three environments. <br>
<br>
It sounds like TSP (travelling salesman) would be a useful
algorithm - find the shortest route to visit multiple sites in one
journey. <br>
<br>
On 21/11/2013 08:31, Wesley Roberts wrote:<br>
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<p class="MsoNormal"><span style="color:#1f497d">Many thanks
Gavin,</span></p>
<p class="MsoNormal"><span style="color:#1f497d"> </span></p>
<p class="MsoNormal"><span style="color:#1f497d">I will look at
the Road Graph option and then at Grass. We have over 300
locations so I would preferably like to automate the task.</span></p>
<p class="MsoNormal"><span style="color:#1f497d"> </span></p>
<p class="MsoNormal"><span style="color:#1f497d">Have been
meaning to refine my PostGIS skills so ideally the pgRouting
option might be my best option.</span></p>
<p class="MsoNormal"><span style="color:#1f497d"> </span></p>
<p class="MsoNormal"><span style="color:#1f497d">Regards,</span></p>
<p class="MsoNormal"><span style="color:#1f497d">Wesley</span></p>
<p class="MsoNormal"><span style="color:#1f497d"> </span></p>
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<div style="border:none;border-top:solid #b5c4df
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"
lang="EN-US"> <a moz-do-not-send="true"
href="mailto:africa-bounces@lists.osgeo.org">africa-bounces@lists.osgeo.org</a>
[mailto:<a moz-do-not-send="true"
href="mailto:africa-bounces@lists.osgeo.org">africa-bounces@lists.osgeo.org</a>]
<b>On Behalf Of </b>Gavin Fleming<br>
<b>Sent:</b> 20 November 2013 06:02 PM<br>
<b>To:</b> <a moz-do-not-send="true"
href="mailto:africa@lists.osgeo.org">africa@lists.osgeo.org</a><br>
<b>Subject:</b> Re: [OSGeo Africa] Routing application</span></p>
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<p class="MsoNormal">
</p>
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<p class="MsoNormal">Hi Wesley<br>
<br>
If it's just a few routes and you need to do the exercise
just a few times then the Road Graph plugin in QGIS should
do the trick. <br>
<br>
If you need to do it more regularly and with more
flexibility the pgRouting gives you tremendous power.<br>
<br>
GRASS also has some really good routing functionality. <br>
<br>
I've used all of the above and from the what you've
described they will all provide the required information. <br>
<br>
Gavin<br>
<br>
On 20/11/2013 16:10, Wesley Roberts wrote:</p>
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<p class="MsoNormal">Dear Colleagues.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I have a quick question regarding a
routing application I am trying to develop. </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">I would like to calculate travel time
between a central location and a number of point locations
(Permanent Monitoring Plots) along a sparse road network.
The points do not occur on the roads. My travel time
calculation is therefore made up of travel along roads (by
car) and walking from the road to the point of interest. I
can calculate distance from each point to the nearest road
fairly easily, however, calculating the distance from each
nearest point to a central location appears to a be a little
more difficult. </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Is this a job for pgRouting? I have found
the following workshop and am happy to work through it
provided the application can undertake the tasks I require (<a
moz-do-not-send="true"
href="http://workshop.pgrouting.org/index.html">http://workshop.pgrouting.org/index.html</a>).</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Does anyone on the list have experience
using this software and will it provide the information I
require? </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Many thanks and kind regards,</p>
<p class="MsoNormal">Wesley</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><img id="Picture_x0020_1"
src="cid:part5.02070506.04090502@gmail.com"
alt="Email_Signature" border="0" height="103" width="334"><span
style="font-size:13.5pt"><br>
<br>
<span style="background:white">Wesley Roberts, PhD.</span><br>
<span style="background:white">Remote Sensing and GIS
Specialist</span><br>
<span style="background:white">BioCarbon Partners</span><br>
<span style="background:white">Email: <a
moz-do-not-send="true"
href="mailto:wes@biocarbonpartners.com">wes@biocarbonpartners.com</a></span><br>
<span style="background:white">Tel +27 83 535 5646 (South
Africa)</span> <br>
<span style="background:white"><a moz-do-not-send="true"
href="http://www.biocarbonpartners.com">www.biocarbonpartners.com</a></span></span></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif""><br>
<br>
<br>
</span></p>
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<span style="font-size:12.0pt;font-family:"Times New
Roman","serif""><br>
<br>
<br>
</span></p>
<pre>-- </pre>
<pre>Gavin Fleming</pre>
<pre>t: 0218620670</pre>
<pre>w: 0218630660</pre>
<pre>c: 0845965680</pre>
<pre>f: 0866164820</pre>
<pre>Paarl</pre>
<pre>South Africa</pre>
<pre>18°59'19.6"E 33°44'46.1"S</pre>
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<pre class="moz-signature" cols="72">--
Gavin Fleming
t: 0218620670
w: 0218630660
c: 0845965680
f: 0866164820
Paarl
South Africa
18°59'19.6"E 33°44'46.1"S</pre>
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