[mkgmap-dev] Fwd: Wrong routing in some closed roundabount

Thu Jul 7 17:05:41 BST 2016

Hi Gerd,

Analyzing and comparing the syntax of your test osm file with my test one,
I found an error in my syntax. The roundabout where I get the unexpected
behavior, the first and the last nodes aren't the same.
I mean, the wrong syntax was the one below:

 <node id="3" lat="-20.4545397" lon="-40.4486877" visible="true"
version="1"/>
 <node id="15" lat="-20.4566083" lon="-40.4487237" visible="true"
version="1"/>
 <node id="20" lat="-20.4540903" lon="-40.4498724" visible="true"
version="1"/>
 <node id="18" lat="-20.4544979" lon="-40.4510719" visible="true"
version="1"/>
 <node id="21" lat="-20.4555235" lon="-40.4515836" visible="true"
version="1"/>
 <node id="19" lat="-20.4565664" lon="-40.4511078" visible="true"
version="1"/>
 <node id="22" lat="-20.4570158" lon="-40.4499232" visible="true"
version="1"/>
 <node id="23" lat="-20.4555826" lon="-40.4482119" visible="true"
version="1"/>
 <node id="24" lat="-20.4540903" lon="-40.4498724" visible="true"
version="1"/>
 <way id="17" visible="true" version="1">
  <nd ref="20"/>
  <nd ref="18"/>
  <nd ref="21"/>
  <nd ref="19"/>
  <nd ref="22"/>
  <nd ref="15"/>
  <nd ref="23"/>
  <nd ref="3"/>
  <nd ref="24"/>
  <tag k='highway' v='unclassified' />
  <tag k='junction' v='roundabout' />
  <tag k="oneway" v="yes"/>
  <tag k="name" v="ROTATÓRIA"/>
 </way>

...when should be:

 <node id="3" lat="-20.4545397" lon="-40.4486877" visible="true"
version="1"/>
 <node id="15" lat="-20.4566083" lon="-40.4487237" visible="true"
version="1"/>
 <node id="20" lat="-20.4540903" lon="-40.4498724" visible="true"
version="1"/>
 <node id="18" lat="-20.4544979" lon="-40.4510719" visible="true"
version="1"/>
 <node id="21" lat="-20.4555235" lon="-40.4515836" visible="true"
version="1"/>
 <node id="19" lat="-20.4565664" lon="-40.4511078" visible="true"
version="1"/>
 <node id="22" lat="-20.4570158" lon="-40.4499232" visible="true"
version="1"/>
 <node id="23" lat="-20.4555826" lon="-40.4482119" visible="true"
version="1"/>
 <way id="17" visible="true" version="1">
  <nd ref="20"/>
  <nd ref="18"/>
  <nd ref="21"/>
  <nd ref="19"/>
  <nd ref="22"/>
  <nd ref="15"/>
  <nd ref="23"/>
  <nd ref="3"/>
  <nd ref="20"/>
  <tag k='highway' v='unclassified' />
  <tag k='junction' v='roundabout' />
  <tag k="oneway" v="yes"/>
  <tag k="name" v="ROTATÓRIA"/>
 </way>

Thank you very much by your time. Your analysis showed me the way so I
could diagnose my problem.

Regards,

Alexandre

2016-07-07 4:09 GMT-03:00 Gerd Petermann <GPetermann_muenchen at hotmail.com>:

> Hi Alexandandre,
>
>
> I tried to reproduce the problem using the attached input file. Routing
> works for both cases.
>
> So there is probably more to it. If you can reproduce the problem, please
> let me know how.
>
>
> Gerd
> ------------------------------
> *Von:* Gerd Petermann
> *Gesendet:* Mittwoch, 6. Juli 2016 18:12:22
> *An:* Development list for mkgmap
> *Betreff:* AW: [mkgmap-dev] Fwd: Wrong routing in some closed roundabount
>
>
> Hi Alexandre,
>
>
> seems that you have test data. Please post a link to it.
>
>
> Gerd
> ------------------------------
> *Von:* mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von
> Alexandre Loss <alexandre.loss at gmail.com>
> *Gesendet:* Mittwoch, 6. Juli 2016 12:08:11
> *An:* Development list for mkgmap
> *Betreff:* [mkgmap-dev] Fwd: Wrong routing in some closed roundabount
>
> Hi Gerd,
>
> Now you are back, please take a look at this problem when you have time.
> Thanks.
>
> Alexandre Loss
>
> ---------- Forwarded message ----------
> From: Alexandre Loss <alexandre.loss at gmail.com>
> Date: 2016-06-06 13:35 GMT-03:00
> Subject: Wrong routing in some closed roundabount
> To: Development list for mkgmap <mkgmap-dev at lists.mkgmap.org.uk>
>
>
> Hi guys,
>
> We note in our group a strange behavior in some roundabounts that are
> complete loops. Investigating, we discovered that when the starting and
> ending points of a roundabout coincides with a routable node, we are able
> to route through this roundabout. However, if the starting and ending
> points of a roundabout don't match a rountable node, we have problem to
> route through this roundabout.
>
> The example bellow shows this clearly when trying to create a route em
> Mapsource from point A to B:
>
> [image: Imagem inline 2]
>
> Thank you for your time.
>
> Alexandre Loss
>
>
> _______________________________________________
> mkgmap-dev mailing list
> mkgmap-dev at lists.mkgmap.org.uk
> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
>
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