<div dir="ltr"><div class="markdown-here-wrapper" style=""><p style="margin:0px 0px 1.2em!important">Hi Vicky,<br>you are right. Below my steps.</p>
<p style="margin:0px 0px 1.2em!important">In you example you create a table with the geometric and cost infos for every edge.<br>Instead I import a shapefile that have inside the right directions of the edges (but not the cost), and I want to use these directions to calculate if it’s possible to go in example  from point A to point N.<br>Than I think that before to use  pgr_createTopology   and pgr_dijkstra, I must calculate the cost outside pg_routing. Am I right?</p>
<p style="margin:0px 0px 1.2em!important">These are my steps:</p>
<ul style="margin:1.2em 0px;padding-left:2em">
<li style="margin:0.5em 0px">I import a shapefile (I’m attaching it) with <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">ogr2ogr -overwrite -lco LAUNDER=No -f PostgreSQL PG:"dbname=mydb host=localhost port=5432 user=myuser password=mypassword" "linee.shp" -nln "linee"</code>;</li>
<li style="margin:0.5em 0px">then I run</li>
</ul>
<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="hljs language-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;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="hljs-operator"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">ALTER</span> <span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">TABLE</span> linee <span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">ADD</span> source INT4;</span>
<span class="hljs-operator"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">ALTER</span> <span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">TABLE</span> linee <span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">ADD</span> target INT4;</span>
<span class="hljs-operator"><span class="hljs-keyword" style="color:rgb(51,51,51);font-weight:bold">select</span> pgr_createTopology(<span class="hljs-string" style="color:rgb(221,17,68)">'linee'</span>, <span class="hljs-number" style="color:rgb(0,128,128)">0.000001</span>,the_geom:=<span class="hljs-string" style="color:rgb(221,17,68)">'wkb_geometry'</span>,id:=<span class="hljs-string" style="color:rgb(221,17,68)">'ogc_fid'</span>);</span>
</code></pre>
<ul style="margin:1.2em 0px;padding-left:2em">
<li style="margin:0.5em 0px">and finally</li>
</ul>
<pre style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;font-size:1em;line-height:1.2em;margin:1.2em 0px"><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;white-space:pre;overflow:auto;border-radius:3px;border:1px solid rgb(204,204,204);padding:0.5em 0.7em;display:block!important">SELECT * FROM pgr_dijkstra('SELECT ogc_fid as id, source, target, st_length(wkb_geometry) 
                           as "cost" FROM linee',1,ARRAY[2,3,4,5,6])
</code></pre><p style="margin:0px 0px 1.2em!important">It gives me in output the table below:</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">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">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">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">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">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">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">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">7</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">8</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">9</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">10</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">I need way to have that it’s impossible to go 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> to <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>, because the edge <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">2</code> has direction that blocks it.</p>
<p style="margin:0px 0px 1.2em!important">Thank you very much, especially for your patience</p>
<p style="margin:0px 0px 1.2em!important"><img src="cid:ii_jhg9u1o91" alt="immagine.png" style="margin-right: 0px;"></p>
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aXY+PGRpdj48YnI+PC9kaXY+" style="height:0;width:0;max-height:0;max-width:0;overflow:hidden;font-size:0em;padding:0;margin:0">​</div></div><div class="markdown-here-signature">-- <br><div dir="ltr" class="gmail-m_583510974186457047gmail_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><br></div><div><br></div></div></div>