<html><body bgcolor="#FFFFFF"><div>If the bridge and tunnel are valid route options, can you remove the node and make them topologically incorrect? Meaning, crossing lines with no node intersection so there is no option to turn. I'm not sure if module needs topologically correct lines/network.</div><div> </div><div>Alternatively, if<span class="Apple-style-span" style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); "> the bridge or tunnel is not a valid route, can you break the network connection by creating a gap in the line/network for either the bridge or tunnel so one route is not an option? </span><br></div><div><br>Mark</div><div><br>On Apr 29, 2010, at 3:51 PM, Robbie Heremans <<a href="mailto:robbie.heremans@gmail.com">robbie.heremans@gmail.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div><span class="Apple-style-span" style="font-family: Helvetica; font-size: medium; ">Dear,</span><div><font class="Apple-style-span" face="Helvetica"><span class="Apple-style-span" style="font-size: medium;"><br></span></font></div>
<div><span class="Apple-style-span" style="font-family: Helvetica; font-size: medium; ">In order to perform (shortest path) network analysis, how can I specify that<br>the crossing of 2 lines in a roadmap is not an intersection but a tunnel/bridge<br>
(impossible to turn left or right)?<br><br>Is v.digit the right way to do this (deleting en changing lines/vertices)?</span><div><font class="Apple-style-span" face="Helvetica"><span class="Apple-style-span" style="font-size: medium;"><br>
</span></font></div><div><font class="Apple-style-span" face="Helvetica"><span class="Apple-style-span" style="font-size: medium;">Robbie</span></font></div></div>
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