[Graphhopper] TomTom data's integration

[Peter K]

Hey Philippe,

edges (and also nodes) is one big 'array' as explained in the developer
guide:
https://github.com/graphhopper/graphhopper/wiki/Developers (Technical
Overview)
So, every edge has the same number of properties. E.g. the distance, but
also an integer reference to the wayGeometry.

the loc2index serves the purpose of retrieving a node-id from a gps
coordinate. See Location2IDIndex.
Also this file is just a big integer array (although this will change in
the upcomming push) and it is a simplistic quadtree.

To integrate a different source other than OpenStreetMap you will need
to adjust the import (see the OSMReader* classes).
E.g. create edges like this
graph.edge(a, b, distance,
flagsLikeVelocityAndDirection).wayGeometry(listOfCoordinatesBetween_a_and_b)

and add node information like so:
graph.setNode(nodeIndex, latitude, longitude)

If you want to store more information than this you'll have to extend
GraphStorage - see LevelGraphStorage or GraphStorage3D.

Let me know if you need more information!

Regards,
Peter.


> Hi Peter,
>
>  
>
> We would like to start our TomTom data's integration into GraphHopper.
>
>  
>
> Could you describe us how your data's are organised on the file system?
>
> Could you describe the different concept: edge, nodes, loc2index, ...?
>
>  
>
> Thank you for your help.
>
>  
>
> Regards.
>
>  
>
> *Suray Philippe*
>
> Product & Project Manager
>
>  
>
> *Market-IP --*///Creating Mobile Intelligence/
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>
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