[GraphHopper] Graphhopper and Pg_Routing Bridge

[Markware Software Services]

Hi All

I have been looking at Graphhopper for our routing needs and also looking
at Pg_Routing and both packages are very impressive.

In a Nutshell, if you want to compare the two, Graphhopper's best feature
is it speed, PG_Routing's best feature is flexibility (speed is not it ..
that is for sure)

It struck me last night that there may be a way to get the best form both
environments. I have been looking at how I can use Graphhopper in a Dynamic
and Changing environment for our Disaster Network as well as a few other
possibilities, but I need the ability to be able to quickly update road
unavailability due to flooding, etc so that routing will not be used on
those areas.

PG_Routing makes this quite easy by simply adding a high cost to that
bridge or segment of road Whereas Graphhopper requires the rebuilding of
the entire graph. (at the moment anyway)

My thought was, why not use both!! Use PG_Routing to maintain the graph
design and costs but make a program that builds the graphhopper graph based
on the pg_routing database and not the osm file ..

My gut feel tells me that this might be quite feasible from a timing
standpoint, but I am not sure if the structure of the routing database is
suited to sequential scanning and building a graphhopper graph. If it was,
this would be a relative painless process that could be done daily (or
less) or on demand for disaster prone applications

Unfortunately my Java and C skills are virtually non existent (I am a VB
and Windows guy) and pulling the code apart to look at this is going to be
extremely difficult for me

I would be interested in your thoughts and if you see any immediate
ShowStoppers in this or any reason that it should not be done.


Regards

Mark Cupitt

"If we change the world, let it bear the mark of our intelligence"

See me on Open Street Map <https://www.openstreetmap.org/user/Mark_Cupitt>

See me on LinkedIn <http://ph.linkedin.com/in/markcupitt>



*See me on StackExchange <http://gis.stackexchange.com/users/17846/mark-c>*
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