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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>This is a problem that I’ve spent much time thinking about. I have never come across a satisfactory automated solution. The problem is that as the transit system becomes larger and more complex, dealing with line offsets also becomes exponentially complicated. From experience, I can say that it is hard enough trying to lay out a system map by hand – I couldn’t even begin to describe an algorithm for automating it.<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 style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>ESRI has a <a href="http://blogs.esri.com/esri/arcgis/2007/12/12/create-route-maps-with-the-arcgis-schematics-extension/">Schematics extension</a> that is intended for this purpose, although I suspect it is not entirely reliable. I have not seen any comparable open source solution but would love to hear about one if anyone else has suggestions.<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 style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Depending on the level of abstraction, I tend to do all of my transit network diagrams in a vector drawing program such as Inkscape and only utilize GIS for background reference material.<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 style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Spencer<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 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:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> qgis-user-bounces@lists.osgeo.org [mailto:qgis-user-bounces@lists.osgeo.org] <b>On Behalf Of </b>Olivier Dalang<br><b>Sent:</b> Monday, March 04, 2013 10:55 AM<br><b>To:</b> qgis-user@lists.osgeo.org<br><b>Subject:</b> [Qgis-user] Public transportation maps<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi !<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Does any of you have some experience in creating public transportation maps (bus) with QGis ?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The main problem I have is representing superposed lines with an offset (as here : <a href="http://www.cuk.ch/images/articles/3714/tpg_plan.jpg">http://www.cuk.ch/images/articles/3714/tpg_plan.jpg</a> )<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>For the sake of editability and multi-scale display, I'd like to use "line offset" rather than actually offsetting the lines.<o:p></o:p></p></div><div><p class=MsoNormal>One solution would be to offset each bus line of a different amount, but then, when not superposed, the bus line would display beside the road...<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>It seems line offset can't be data-defined... Is there a workaround ?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Thanks !!<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Olivier<o:p></o:p></p></div></div><HR>
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