I must correct myself: I’m NOT able to read in the data that 3 is not reachable from 1.<div><br></div><div>Thank you<br><br><div class="gmail_quote"><div dir="ltr">Il gio 17 mag 2018, 23:57 andy <<a href="mailto:aborruso@gmail.com">aborruso@gmail.com</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex" id="gmail_block_quote0"><div dir="ltr"><div class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274markdown-here-wrapper"><p style="margin:0px 0px 1.2em!important">Hi Vicky,</p></div></div><div dir="ltr"><div class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274markdown-here-wrapper">
<p style="margin:0px 0px 1.2em!important">On Thu, 17 May 2018 at 20:22, Vicky Vergara <a href="http://mailto:vicky@georepublic.de" target="_blank">vicky@georepublic.de</a> wrote:</p>
<p style="margin:0px 0px 1.2em!important"></p><div class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274markdown-here-exclude"><p></p><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><br><div style="font-family:arial,helvetica,sans-serif">I suggest that you follow the workshop,<br></div><div style="font-family:arial,helvetica,sans-serif"><a href="https://workshop.pgrouting.org/2.4.11/en/index.html" target="_blank">https://workshop.pgrouting.org/2.4.11/en/index.html</a></div><div style="font-family:arial,helvetica,sans-serif">and/or use the sample data of the documentation and do the examples on the documentation (there is a "tutorial" in the documentation, maybe out of date, but gives an idea)<br></div><br></div></blockquote><p></p></div><p style="margin:0px 0px 1.2em!important"></p>
</div></div><div dir="ltr"><div class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274markdown-here-wrapper"><p style="margin:0px 0px 1.2em!important">Thank you.</p></div></div><div dir="ltr"><div class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274markdown-here-wrapper">
<p style="margin:0px 0px 1.2em!important"></p><div class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274markdown-here-exclude"><p></p><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div style="font-family:arial,helvetica,sans-serif"><br></div><div style="font-family:arial,helvetica,sans-serif">The straight answer to your question is yes, you need a cost (& reverse_cost is optional)</div></div></blockquote><p></p></div><p style="margin:0px 0px 1.2em!important"></p>
</div></div><div dir="ltr"><div class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274markdown-here-wrapper"><p style="margin:0px 0px 1.2em!important">Now I have a route with a cost:</p>
<table style="margin:1.2em 0px;padding:0px;border-collapse:collapse;border-spacing:0px;font:inherit;border:0px none">
<thead>
<tr style="border-color:rgb(204,204,204) currentcolor currentcolor;border-style:solid none none;border-width:1px 0px 0px;background-color:white;margin:0px;padding:0px">
<th style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em;font-weight:bold;background-color:rgb(240,240,240)">seq</th>
<th style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em;font-weight:bold;background-color:rgb(240,240,240)">path_seq</th>
<th style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em;font-weight:bold;background-color:rgb(240,240,240)">end_vid</th>
<th style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em;font-weight:bold;background-color:rgb(240,240,240)">node</th>
<th style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em;font-weight:bold;background-color:rgb(240,240,240)">edge</th>
<th style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em;font-weight:bold;background-color:rgb(240,240,240)">cost</th>
<th style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em;font-weight:bold;background-color:rgb(240,240,240)">agg_cost</th>
</tr>
</thead>
<tbody style="margin:0px;padding:0px;border:0px none">
<tr style="border-color:rgb(204,204,204) currentcolor currentcolor;border-style:solid none none;border-width:1px 0px 0px;background-color:white;margin:0px;padding:0px">
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">2</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1875.887941</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">0.0</td>
</tr>
<tr style="border-color:rgb(204,204,204) currentcolor currentcolor;border-style:solid none none;border-width:1px 0px 0px;background-color:white;margin:0px;padding:0px;background-color:rgb(248,248,248)">
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">2</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">2</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">2</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">2</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">-1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">0.0</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1875.887941</td>
</tr>
<tr style="border-color:rgb(204,204,204) currentcolor currentcolor;border-style:solid none none;border-width:1px 0px 0px;background-color:white;margin:0px;padding:0px">
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">3</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">3</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">2</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1551.56248159</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">0.0</td>
</tr>
<tr style="border-color:rgb(204,204,204) currentcolor currentcolor;border-style:solid none none;border-width:1px 0px 0px;background-color:white;margin:0px;padding:0px;background-color:rgb(248,248,248)">
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">4</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">2</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">3</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">3</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">-1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">0.0</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1551.56248159</td>
</tr>
<tr style="border-color:rgb(204,204,204) currentcolor currentcolor;border-style:solid none none;border-width:1px 0px 0px;background-color:white;margin:0px;padding:0px">
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">5</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">4</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">3</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1506.74402482</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">0.0</td>
</tr>
<tr style="border-color:rgb(204,204,204) currentcolor currentcolor;border-style:solid none none;border-width:1px 0px 0px;background-color:white;margin:0px;padding:0px;background-color:rgb(248,248,248)">
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">6</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">2</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">4</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">4</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">-1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">0.0</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1506.74402482</td>
</tr>
<tr style="border-color:rgb(204,204,204) currentcolor currentcolor;border-style:solid none none;border-width:1px 0px 0px;background-color:white;margin:0px;padding:0px">
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">7</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">5</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">3</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1506.74402482</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">0.0</td>
</tr>
<tr style="border-color:rgb(204,204,204) currentcolor currentcolor;border-style:solid none none;border-width:1px 0px 0px;background-color:white;margin:0px;padding:0px;background-color:rgb(248,248,248)">
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">8</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">2</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">5</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">4</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">4</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1208.08883443</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1506.74402482</td>
</tr>
<tr style="border-color:rgb(204,204,204) currentcolor currentcolor;border-style:solid none none;border-width:1px 0px 0px;background-color:white;margin:0px;padding:0px">
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">9</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">3</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">5</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">5</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">-1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">0.0</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">2714.83285924</td>
</tr>
<tr style="border-color:rgb(204,204,204) currentcolor currentcolor;border-style:solid none none;border-width:1px 0px 0px;background-color:white;margin:0px;padding:0px;background-color:rgb(248,248,248)">
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">10</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">6</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1875.887941</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">0.0</td>
</tr>
<tr style="border-color:rgb(204,204,204) currentcolor currentcolor;border-style:solid none none;border-width:1px 0px 0px;background-color:white;margin:0px;padding:0px">
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">11</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">2</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">6</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">2</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">5</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1447.12212188</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">1875.887941</td>
</tr>
<tr style="border-color:rgb(204,204,204) currentcolor currentcolor;border-style:solid none none;border-width:1px 0px 0px;background-color:white;margin:0px;padding:0px;background-color:rgb(248,248,248)">
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">12</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">3</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">6</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">6</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">-1</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">0.0</td>
<td style="font-size:1em;border:1px solid rgb(204,204,204);margin:0px;padding:0.5em 1em">3323.01006288</td>
</tr>
</tbody>
</table>
<p style="margin:0px 0px 1.2em!important">The command I have used:</p>
<pre style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;font-size:1em;line-height:1.2em;margin:1.2em 0px"><code class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274hljs m_-9176503808122599459m_2237830546132782261m_2941265992986126274language-sql" style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);background-color:rgb(248,248,248);border-radius:3px;display:inline;white-space:pre-wrap;overflow:auto;border-radius:3px;border:1px solid rgb(204,204,204);padding:0.5em 0.7em;display:block!important;display:block;overflow-x:auto;padding:0.5em;color:rgb(51,51,51);background:rgb(248,248,248) none repeat scroll 0% 0%"><span class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274hljs-operator"><span class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">SELECT</span> * <span class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">FROM</span> pgr_dijkstra(<span class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274hljs-string" style="color:rgb(221,17,68)">'SELECT ogc_fid as id, source, target, st_length(wkb_geometry) 
                           as "cost" FROM linee'</span>,<span class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274hljs-number" style="color:rgb(0,128,128)">1</span>,<span class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274hljs-built_in" style="color:rgb(0,134,179)">ARRAY</span>[<span class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274hljs-number" style="color:rgb(0,128,128)">2</span>,<span class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274hljs-number" style="color:rgb(0,128,128)">3</span>,<span class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274hljs-number" style="color:rgb(0,128,128)">4</span>,<span class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274hljs-number" style="color:rgb(0,128,128)">5</span>,<span class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274hljs-number" style="color:rgb(0,128,128)">6</span>])</span>
</code></pre>
<p style="margin:0px 0px 1.2em!important">The starting point is <code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);background-color:rgb(248,248,248);border-radius:3px;display:inline">1</code>, but I’m able to read in the data that <code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);background-color:rgb(248,248,248);border-radius:3px;display:inline">3</code>   is not reachable   from <code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);background-color:rgb(248,248,248);border-radius:3px;display:inline">1</code>.</p>
<p style="margin:0px 0px 1.2em!important">What’s wrong in  my reasoning  ?</p>
<p style="margin:0px 0px 1.2em!important">Thank you</p><p style="margin:0px 0px 1.2em!important"><img src="cid:ii_jhb2noha0" alt="immagine.png" style="margin-right: 0px; width: 288px;" id="iii_jhb2noha0" class="nativeView"><br><br></p>
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PC9kaXY+" style="height:0;width:0;max-height:0;max-width:0;overflow:hidden;font-size:0em;padding:0;margin:0">​</div></div></div><div dir="ltr">-- <br><div dir="ltr" class="m_-9176503808122599459m_2237830546132782261m_2941265992986126274gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><span style="font-size:small">___________________</span><br></div><div dir="ltr"><span style="font-size:small"><br></span></div><div dir="ltr">Andrea Borruso<br>
website: <a href="https://medium.com/tantotanto" target="_blank">https://medium.com/tantotanto</a><br>38° 7' 48" N, 13° 21' 9" E, EPSG:4326<br><span style="font-size:small">___________________</span><br>
<br>
"cercare e saper riconoscere chi e cosa,<br>
 in mezzo all’inferno, non è inferno, <br>
e farlo durare, e dargli spazio"<br>
<br>
Italo Calvino<br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></blockquote></div></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><p dir="ltr">______<br>
Scusami per la brevità, ti sto scrivendo dal cellulare.</p>
<p dir="ltr">website: <a href="https://medium.com/tantotanto">https://medium.com/tantotanto</a><br>
38° 7' 48" N, 13° 21' 9" E EPSG:4326</p>
</div>