[pgrouting-users] about use of navteq data

[lorenzo amato]

Hi Charles, Hi list

Your experience with Navteq data is very interesting.
Have a nice vacation and give us some more details when you come back!!

2011/1/7 Charles Galpin <cgalpin at lhsw.com>

> Hi Emre
>
> I am using navteq data and would be happy to help, but I am about to take a
> week long vacation tomorrow morning so hopefully you are not in a rush.
>
> The short answer is
>
> - assign_vertex does a good job of generating the source/target nodes using
> 0.00001 for me
> - for speed, I found I needed to limit the amount of data presented to the
> routing engine. One was is to reduce the data set (ie remove/limit the
> func_class 4 roads you don't need). The other is I create a rectangle around
> the start and the end point and some percentage of the distance between the
> points as the width and limit the data to that. The narrower the rectangle
> the less data the routing engine uses, but if you have large arching roads
> you have to increase this (I use about 70%). Either way it helps speed up
> the routing for me.
> - For z levels search the archives but both Steven Woodbridge and I posted
> our versions of a 3d assign_vertex.
>
> I'd be happy to answer any specific questions, and look forward to seeing
> your progress.
>
> charles
>
> On Jan 7, 2011, at 4:31 AM, Emre Koc wrote:
>
> Hello,
>
> I am new to pgRouting and trying to figure out how to use it with navteq
> data. I used pgRouting with osm data and it worked perfect but for navteq
> data i tried to use ref_in_id and nref_in_id but it turned out that
> pgRouting found the path very slow when I used these for source and target.
> How can I calculate a correct topology for pgRouting by taking z levels into
> consideration ? Shall define geometry as 3D with z levels embedded or is it
> possible to use 2d multilinestring with additional z level column ?
>
> Since I am new to pgRouting these questions are very hard for me to solve,
> but after I figure out how to use pgRouting I would be more than happy to
> contribute to project.
>
> Thanks in advance,
>
> Emre
>
>
>
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>


-- 
Lorenzo Amato
lorenzo.amato at geosdi.org
lorenzotlc at gmail.com
lorenzo.amato at nsdi.it

Consiglio Nazionale delle Ricerche
Istituto di Metodologie per l'Analisi Ambientale - geoSDI
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