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[mkgmap-dev] Commit: r766: Write more of the *.mp-data.

From Alexander Atanasov aatanasov at gmail.com on Thu Dec 4 18:18:20 GMT 2008


On 12/4/08, Robert Vollmert <rvollmert-lists at gmx.net> wrote:
> On Dec 4, 2008, at 16:31, Alexander Atanasov wrote:
> > Links are helpful for fastest route, for shortest may be not.
> > Does the routing work in both modes as expected?
> >
> The "fastest" routes for cars look fine to me. The shortest routes
> are a little strange -- they make obvious detours. Also, the
> "Dist To Dest" is too low, I'm getting 15km instead of 17km for an
> example here. My guess would be that the arc lengths aren't all quite
> right.
> (We're not writing proper lengths in NET at all so far, but I don't
> think that should be involved in routing. More likely to do with
> addressing.)

Headings are angle of first and second point, and last-1 vs last.
Lenght should be sum of distances of all points in the line.
 How are lenghts calculated?

> I'm also noticing that when viewing the route on the map (all my testing
> is on a Vista HCx), it doesn't follow curvy segments at low zoom levels,
> cutting them straight instead. If I zoom in, the display is corrected.
> So probably, there's some curviness data missing.

  Are the roads present at that map level?
They should be even simplified as a signle point, that is polyline
with point and one zero  delta. And that segment is in net.

have fun,

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