[GraphHopper] How to find the near by streets/roads of a point

[George]

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.

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
http://www.walkscore.com/score/loc/lat=40.606650590407185/lng=-73.75774383544922
(
Are you suggesting to provide a big gap between points and see the Dijkstra
algorithm covering all neighbors for the given duration)

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 Graphhopper 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).

4. OSMReader.isInBounds, seems straight forward.

Thanks for creating Graphhopper


On Mon, Jul 15, 2013 at 3:06 AM, Peter K <peathal at yahoo.de> wrote:

> Hi Georg,
>
> > Given a point is it possible to query the near by roads/streets from
> graphhopper.
>
> You can do that via an adapted LocationIDIndex. In a few days/weeks you
> can directly use this without changing something.
>
>
> > This is to find something like a walkable/drivable distance from a
> point given a time duration.
>
> You could limit calculation in e.g. Dijkstra via the time duration
> (which will limit the shortest path tree) and then the SPT itself will
> give you the covered area.
>
>
> > To look in another perspective, the need is to find the nervous lines
> of a place.
>
> What are nervous lines of a place?
>
>
> > Is it possible to calculate the distance of a line with multiple
> points in between?
>
> What do you mean?
>
>
> > During the graph building process can i selectively index multiple
> cities while i feed with a whole country osm file.
>
> You can restrict the boundaries of an indexed area via overriding
> OSMReader.isInBounds
>
> Regards,
> Peter.
>
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>



-- 
Thanks
George L
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