<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
code
{mso-style-priority:99;
font-family:"Courier New";}
pre
{mso-style-priority:99;
mso-style-link:"Préformaté HTML Car";
margin:0cm;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Texte de bulles Car";
margin:0cm;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0cm;
margin-right:0cm;
margin-bottom:0cm;
margin-left:36.0pt;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.PrformatHTMLCar
{mso-style-name:"Préformaté HTML Car";
mso-style-priority:99;
mso-style-link:"Préformaté HTML";
font-family:Consolas;
mso-fareast-language:FR-BE;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.TextedebullesCar
{mso-style-name:"Texte de bulles Car";
mso-style-priority:99;
mso-style-link:"Texte de bulles";
font-family:"Tahoma","sans-serif";
mso-fareast-language:FR-BE;}
.MsoChpDefault
{mso-style-type:export-only;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:683938558;
mso-list-template-ids:1997931890;}
@list l0:level1
{mso-level-tab-stop:36.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level2
{mso-level-tab-stop:72.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level3
{mso-level-tab-stop:108.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level4
{mso-level-tab-stop:144.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level5
{mso-level-tab-stop:180.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level6
{mso-level-tab-stop:216.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level7
{mso-level-tab-stop:252.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level8
{mso-level-tab-stop:288.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level9
{mso-level-tab-stop:324.0pt;
mso-level-number-position:left;
text-indent:-18.0pt;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="FR-BE" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hello guys,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">That implementation won’t be efficient I think.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">First thing you must know about using real time weighting is that you won’t be able to use contractions hierarchies unless you re-contract the
whole graph any time you change any edge’s weight.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Without contraction you’ll have a serious downgrade of performances.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If you still want to perform real time weighting, the best option is to update the edge’s weight with your live traffic info, so updating the flags.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">> 1.) Which flags are included and which position they are set?<br>
</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This depends on the flag encoders you use, check the CarFlagEncoder class.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">> 2.) Is there a convinient way to get a single EdgeIteratorState Object directly by poviding its ID?</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If you know it’s GraphHopper’s ID, you can do graph.getEdgeProps(edgeId, Integer.MIN_VALUE) but you’ll have to maintain a way to link OSM ID’s
with GH’s ids.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Nicolas GILLET<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Market-IP –</span></b><i><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
</span></i><i><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#404040">Creating Mobile Intelligence</span></i><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Phone : +32 81 33 11 11
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Fax : +32 81 33 11 10<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="http://www.market-ip.com/">www.market-ip.com</a> –
<a href="http://www.telefleet.com/">www.telefleet.com</a> – <a href="http://www.geoplanning.net/">
www.geoplanning.net</a> – <a href="http://www.drivexpert.net/">www.drivexpert.net</a>
<o:p></o:p></span></p>
<p class="MsoNormal"><a href="http://www.linkedin.com/groups/MarketIP-4289716?gid=4289716&trk=hb_side_g"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;text-decoration:none"><img border="0" width="30" height="25" id="Image_x0020_1" src="cid:image001.png@01CF0AD5.FD12E720" alt="Description : cid:image003.png@01CD5521.849F3340"></span></a><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="FR" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">De :</span></b><span lang="FR" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> lanmaster@hotmail.ru [mailto:lanmaster@hotmail.ru]
<br>
<b>Envoyé :</b> lundi 6 janvier 2014 11:47<br>
<b>À :</b> Jrgen Zornig<br>
<b>Cc :</b> GraphHopper Java routing engine<br>
<b>Objet :</b> Re: [GraphHopper] How to consider traffic jam when route on road network?<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello, Jrgen!<br>
<br>
I think about this implementation:<br>
1. We have in-memory arraylist, that contains infos about traffic jam<br>
2. We have function that can calculate weight of way by two coordinate pairs (from node / to node)<br>
3. We have modification on Graphhopper's route calculate algorithm, that can request weight from our weight function (2) and summarize it with original Graphhopper's weight.<br>
<br>
Can that implementation be useful, how do you think?<br>
<br>
<br>
Пнд 06 Янв 2014 15:16:52 +0500, Jrgen Zornig <<a href="mailto:juergen.zornig@gmail.com">juergen.zornig@gmail.com</a>> написал:<o:p></o:p></p>
<div>
<p class="MsoNormal">I am also trying to figure out how real time graph modifications and short and temporary events should be handled for the routing.<br>
<br>
I assume you use to OSM graph? That makes things more complicated I think,because I have not found a function to retrieve a single Edge without iterating over and over the whole graph. Even when you know the Edge Id, you have to iterate over all Edges.<br>
<br>
In our scenario, we use a different (our own) graph, and while loading it, I build up a HashMap for all EdgeIteratorState Objects I have generated during loading. So I can easily find a corresponding Edge for a given TrafficJam, either by directly referencing
it over our EdgeIds or by finding out the Id via the LocationIndex (NodeIds and the referenced EdgeIds).<br>
<br>
When having the corresponding EdgeIteratorState Object it should be simple to deactivate the Edge by calling setFlags(), but I also have no clue yet, how to set this bitmask because I couldn't find any documentation on to flags itself.<br>
<br>
So I want to add to this question: <br>
<br>
1.) Which flags are included and which position they are set?<br>
2.) Is there a convinient way to get a single EdgeIteratorState Object directly by poviding its ID?<br>
<br>
I am in need of these functions to handle real time traffic data on the graph. <br>
<br>
P.S. Perhaps we can figure it out by ourselves, so Peter doesn't have to answer every single question ;)
<br>
<br>
Regards,<br>
<br>
Juergen<br>
<br>
Am 06.01.2014 09:54, schrieb <a href="/compose/?adb_to=lanmaster@hotmail.ru" target="_blank">
lanmaster@hotmail.ru</a>:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p>Graphhopper is a project for finding routes over a road network. It also provides functionality for weighting this routing like
<code><span style="font-size:10.0pt">fastest</span></code> or <code><span style="font-size:10.0pt">shortest</span></code> path e.g. via the FastestWeighting class. Now, the question is: how can we extend
<code><span style="font-size:10.0pt">Graphhopper</span></code> to use the speed data we get from our traffic provider in realtime?<o:p></o:p></p>
<p>As I can see:<o:p></o:p></p>
<ol start="1" type="1">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
We must create a function that gets traffic jam data from our database.<o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
We must force use that modified function (Encoder?) somewhere in Graphhopper <code>
<span style="font-size:10.0pt">route()</span></code> function. Do I think right?<o:p></o:p></li></ol>
<p>Please show me how we can do this by example.<o:p></o:p></p>
</div>
<p class="MsoNormal"><br>
<br>
<br>
<o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>GraphHopper mailing list<o:p></o:p></pre>
<pre><a href="mailto:GraphHopper@openstreetmap.org" target="_blank">GraphHopper@openstreetmap.org</a><o:p></o:p></pre>
<pre><a href="https://lists.openstreetmap.org/listinfo/graphhopper" target="_blank">https://lists.openstreetmap.org/listinfo/graphhopper</a><o:p></o:p></pre>
</blockquote>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>