[GraphHopper] Additional Datasource for Graph Construction

[Quinton Anderson]

Hi Peter,

Not elevation data, more in line with GTFS, but not quite. It is in fact a custom GIS that has links in its data back to OSM in some cases. Some cases being the way id. It is a simple CSV format export, which I can manipulate in any way before importing it. I do also have a GTFS datasource for train routing, however I was simply going to use OTP as a restful service to do the train routing, not merge the graphs, then merge the routes later. The particular case I am looking at is a custom datasource, that needs to be merged into a single graph with CH. 

One other requirement I have that involves an external datasource is to try and limit walking to areas that have higher densities of "places". This data will come from google or 4square. At a high level, we simply want users to be routed by via the best/safest possible route. The inherent assumption is that alleys and the like won't have any/many places on them. I am not quite sure how to collapse that requirement down into something that is useful within this context yet though. One thought was a cost factoring of some kind. Any thoughts?

On 27 May 2013, at 6:55 PM, Peter K wrote:

> Hi Quinton,
> 
> do you mean external datasource like the elevation data in #43? Or more in the direction of two graphs (like GTFS as external data source) which should be merged?
> 
> Regards,
> Peter.
> 
> 
>> Hi,
>> 
>> I have a separate data source which needs to be merged into the graph as part of the OSM import process. The data essentially consists of a set of ways, each consisting of a way ID and a list of nodes. The Way id corresponds to the OSM way ID exactly. The nodes consist of a lat, long and sequence number within the way (which includes the version). My current thought process is: 
>> to process this separate datasource first
>> Override OSMReaderHelper.parseWay, 
>> and add the functionality to extract the way ID
>> Add the external nodes to the list where applicable based on a match of the way IDs between the datasets, and in the correct order.
>> 
>> This should allow my external data to mix in quite nicely. Can anyone suggest a better approach or a way to generalize it better?
>> 
>> Regards,
>> Quinton Anderson
> 
> _______________________________________________
> GraphHopper mailing list
> GraphHopper at openstreetmap.org
> http://lists.openstreetmap.org/listinfo/graphhopper

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/graphhopper/attachments/20130527/27f0f28f/attachment-0001.html>