<br><br><div class="gmail_quote">2011/1/12 Markus Innerebner <span dir="ltr"><<a href="mailto:markus.innerebner@inf.unibz.it">markus.innerebner@inf.unibz.it</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">Daniel Kastl wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
ok, thanks<br>
</blockquote>
The algorithm uses only the cost column(or reverse_cost column) of the<br>
edges to compute the costs of the target vertex? This means there is no way<br>
to compute the cost in dependency of a passed walking speed parameter, where<br>
cost are defined as edge_length/speed.<br>
<br>
<br>
</blockquote>
The cost is what you define as cost. Anything is OK. You select the cost<br>
column in your query, which can be a combination of several attributes.<br>
</blockquote></div>
ok, perfect.<br>
<br>
My last question now:<br>
the function returns a edge_id, described by the identifier of the edge crossed. What is the benefit of this attribute? What does this edge do?<br>
If the result contains the vertices reached in the given time from the query point, why also adding the edge identifier?</blockquote><div><br></div><div>Nothing ;-) ... it doesn't do anything as far as I remember. (or please correct me, Anton)</div>
<div>It's possible to discuss whether this is a good idea or not, but the reason is that the query result is in the same form as the core shortest path functions. You don't need to select everything ("*").</div>
<div><br></div><div>Daniel</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div><div></div><div class="h5"><br>
<br>
Markus<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br><span style="font-family:arial, sans-serif;font-size:13px;border-collapse:collapse">Georepublic UG & Georepublic Japan<br>eMail: <a href="mailto:daniel.kastl@georepublic.de" style="color:rgb(66, 99, 171)" target="_blank">daniel.kastl@georepublic.de</a><br>
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