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Hi Jean,<br>
<br>
the precision of an encoded value is defined per value and can be
also 'float' values. See the EncodedValue class and its usage e.g.
in CarFlagEncoder for speed.<br>
<br>
Regards,<br>
Peter<br>
<br>
On 06.05.2015 14:18, jean hilda wrote:<br>
<span style="white-space: pre;">> Hi,<br>
><br>
> Thank you Andreas and Peter for your help. We have already
tried to solve the problem by defining a speed on the ferry routes
(with speed in km/h = Duration / Ferry route lenght). But we are
facing another difficulties : most of our ferry routes are very
short distance (around 200 meters) and for the duration, it's
generally around 50 minutes (because of waiting time / frequency
of rotation and so on). So we get speed for our ferry routes <
1 km (could be 0.2 Km / h). I believe speeds on Graphhopper has to
be strictly > 1 km /h (it has to be an integer). Is there a
way to change that somewhere in the code and authorize speed
between 0 and 1 km /h (not integer) ?<br>
><br>
> Thanks a lot<br>
><br>
> Jean<br>
><br>
> 2015-05-06 11:46 GMT+02:00 Andreas Wolf <<a class="moz-txt-link-abbreviated" href="mailto:dev@a-w.io">dev@a-w.io</a>
<a class="moz-txt-link-rfc2396E" href="mailto:dev@a-w.io"><mailto:dev@a-w.io></a>>:<br>
></span><br>
<blockquote type="cite">Hi,<br>
<br>
Am 05.05.2015 um 12:10 schrieb jean hilda:<br>
> We are testing graphhopper with the CarFlagEncoder. To do so,
we<br>
> have created ways with highway=primary and maxspeed value and
ways<br>
> with route=ferry and duration tags with value = "hh:mm:ss"
(no<br>
> maxspeed for ferry).<br>
<br>
> primary ways and ferry routes are connected with nodes
belonging to<br>
> each others. With duration tag and no maxspeed tag on ferry<br>
> routes, Graphhopper can't find a route. With no duration tag
and<br>
> maxspeed tag on ferry routes, Graphhopper is able to find a
route.<br>
<br>
> Are we missing something or maybe graphhopper don't work with<br>
> duration tags on ferry route ?<br>
<br>
AFAIK, there is no support for durations currently. At least I
have<br>
not seen it in the flag encoding, which is where it should
normally be.<br>
<br>
There are—in my eyes—two ways to add this:<br>
<br>
1. add support for durations in addition to speed or<br>
2. use the length of the ferry and the time to calculate a speed<br>
<br>
Approach 1 is definitely more work, especially in the routing part
(I<br>
have not really dug into that, so I cannot tell you exact steps).<br>
Approach 2 OTOH might be rather inaccurate, as the speed is
rounded<br>
with a given precision (I think 5 km/h by default) to save space.
With<br>
an additional flag, you could probably turn off this rounding for
some<br>
ways (at the expense of lower possible maximum speed, but ferries
are<br>
rather slow anyways).<br>
<br>
Regards<br>
Andreas<br>
<br>
</blockquote>
<span style="white-space: pre;">><br>
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