[GraphHopper] Mapping node id to lat/lon

[Thi Nguyen]

oh, in that case you probably need a mapping between internal node ids and
osm node ids, which could be created when the osm file is read.

On Tue, Dec 9, 2014 at 2:47 PM, Emden R. Gansner <erg at research.att.com>
wrote:

> On 12/8/14 6:14 PM, Thi Nguyen wrote:
>
>> You can use getLat() and getLon() in NodeAccess, if I understand your
>> question correctly.
>>
> Thanks. I wasn't clear enough. A node in the OSM file possesses an id
> field. Is there some way to use that number to
> get the corresponding latitude and longitude or, equivalently, to get the
> internal id? Or perhaps I am not accessing the
> right class implementing NodeAccess. I tried using
>
>      int nodeId = .... // id from OSM file
>      GraphHopper hopper = ....  // graph has been loaded
>      GraphStorage graph = hopper.getGraph();
>      double lat = graph.getNodeAccess().getLatitude(nodeId);   // array
> out of bounds error
>
> Again thanks.
>
>
>
>
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