[GraphHopper] Calculating paths & display routes (Android)

[Ignas Kapočius]

What a fool of me - I somehow managed to mistaken folders while copying
them and there were edges/geometry/etc files on my android device.

Sorry for all this spam and thank you for your help again!





----------------------

Ignas Kapočius



2013/12/17 Peter K <peathal at yahoo.de>

>  without a log file or more info of how your code looks like we probably
> won't be able to help you :)
>
> Regards,
> Peter.
>
>  I'll look into that, thank you!
>
>  What about extracting routing data for a specific city?
> I've tried using bbike http://download.bbbike.org/osm/ , extracted this:
> http://download.bbbike.org/osm/extract/planet_25.1591,54.6528_25.3957,54.752.osm.pbf (Vilnius
> city, Lithuania) and executed ./graphopper.sh import
> vilnius-city-latest.osm.pmf
>
>  Then I've downloaded Lithuania map from here
> http://download.mapsforge.org/maps/europe/ , created folder
> vilnius-city-latest-gh and pasted it into Android file system.
>
>  When I run app it displays a map but when I try calculate distance
> between two points (with your methods) app crashes.
>
>  Then i've tested it with australia map and it's routing data and it
> works. So I'm guessing I have some problems with routing data that I've got
> from bbbike and I've no idea how else to extract correct routing data.
>
>
>
>  ----------------------
>
>  Ignas Kapočius
>
>
>
> 2013/12/17 Peter K <peathal at yahoo.de>
>
>>  Hi Ignas,
>>
>> have a look into the android/ folder. There you see how it work. And you
>> can set the algorithm in the GHRequest object. If contraction hierarchy is
>> enabled only bidirectional algorithms will work. The GHResponse contains
>> all the necessary information like points and instructions.
>>
>>  > Should I first make some kind of subgraph (due to efficiency)?
>>
>>  There are several techniques to make it faster like CH, but you could
>> also use more heuristical routing algorithms, sorting the graph, in-memory
>> instead memory mapped etc
>>
>> Regards,
>> Peter.
>>
>>   Hello,
>>
>>  I've got Graphhopper going on my Android device.
>>
>>  Now my goal is to select two points on the map, apply one of the
>> algorithms (Dijksta, A*, etc) and display results with an overlay.
>>
>>  Due to lack of documentation & being a little bit in a hurry, could
>> somebody point me where/how to start?
>>
>>  I understand the basics - getting point's coordinates, displaying an
>> overlay with results. The part where I'm confused is how to apply search
>> algorithms in Graphhopper?
>>
>>  Should I first make some kind of subgraph (due to efficiency)?
>> How can I get all the points (on streets, i.e.) between those two points?
>> Is there something like getStreet(point1, point2) that gives you back
>> most likely street between your two points?
>>
>>  Pardon my naivety, but I'm new to mapping, routing, etc & my BA thesis'
>> handing in deadline is coming really fast. ;) any help appreciated!
>>  ----------------------
>>
>>  Ignas Kapočius
>>
>>
>>
>
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