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<div class="moz-cite-prefix">Hi George,<br>
<br>
sorry, do you have more specific questions? E.g. regarding 2.:
dijkstra algorithm gives you a shortest path tree for one given
point with which you can do lots of things. Probably some
animations could visualize the shortest path tree better for you:<br>
<a class="moz-txt-link-freetext" href="http://karussell.files.wordpress.com/2012/07/astar.gif">http://karussell.files.wordpress.com/2012/07/astar.gif</a><br>
<br>
Regards,<br>
Peter.<br>
<br>
</div>
<blockquote
cite="mid:CANqbZNOpC5R53FSvduPQYBPrz9DnhdMwfTALp1yDzyFeD2jGag@mail.gmail.com"
type="cite">
<div dir="ltr">1. I read about LocationIdIndex in other threads,
mainly the one about public transport and the other one about
elasticsearch osmosis plugin. It will be nice to have the return
result with all the surrounding roads and streets with names and
their start end points.
<div>
<br>
</div>
<div>2. Limiting Dijkstra algorithm, looking at the code i could
see the algorithm doing fast/shortcalc between 2 points. in my
case i am trying to find the distance one could cover around
a point without having any particular destination, i.e more
like <a moz-do-not-send="true"
href="http://www.walkscore.com/score/loc/lat=40.606650590407185/lng=-73.75774383544922">http://www.walkscore.com/score/loc/lat=40.606650590407185/lng=-73.75774383544922</a> (
Are you suggesting to provide a big gap between points and see
the Dijkstra algorithm covering all neighbors for the given
duration)</div>
<div><br>
</div>
<div>3. Length of a road line in stages. i.e the route distance
of a public transport, with individual distance value between
every stop.The public transport could take any road path not
necessarily a short or fast path. so i should be able to
provide the strict path the <span
style="font-family:arial,sans-serif;font-size:13px">Graphhopper</span> should
take and find the distance covered and time taken to cover
between stops. ( I guess it is possible to do it now also,
but in stages).</div>
<div><br>
</div>
<div>4. <span
style="font-family:arial,sans-serif;font-size:13px">OSMReader.isInBounds,
seems straight forward.</span></div>
<div><span style="font-family:arial,sans-serif;font-size:13px"><br>
</span></div>
<div>
<span style="font-family:arial,sans-serif;font-size:13px">Thanks
for creating Graphhopper</span></div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Mon, Jul 15, 2013 at 3:06 AM,
Peter K <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:peathal@yahoo.de" target="_blank">peathal@yahoo.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hi
Georg,<br>
<div class="im"><br>
> Given a point is it possible to query the near by
roads/streets from<br>
graphhopper.<br>
<br>
</div>
You can do that via an adapted LocationIDIndex. In a few
days/weeks you<br>
can directly use this without changing something.<br>
<br>
<br>
> This is to find something like a walkable/drivable
distance from a<br>
point given a time duration.<br>
<br>
You could limit calculation in e.g. Dijkstra via the time
duration<br>
(which will limit the shortest path tree) and then the SPT
itself will<br>
give you the covered area.<br>
<br>
<br>
> To look in another perspective, the need is to find
the nervous lines<br>
of a place.<br>
<br>
What are nervous lines of a place?<br>
<br>
<br>
> Is it possible to calculate the distance of a line
with multiple<br>
points in between?<br>
<br>
What do you mean?<br>
<br>
<br>
> During the graph building process can i selectively
index multiple<br>
cities while i feed with a whole country osm file.<br>
<br>
You can restrict the boundaries of an indexed area via
overriding<br>
OSMReader.isInBounds<br>
<br>
Regards,<br>
Peter.<br>
<br>
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</blockquote>
</div>
<br>
<br clear="all">
<div><br>
</div>
-- <br>
Thanks<br>
George L<br>
</div>
</div>
<br>
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