[mkgmap-dev] [PATCH v10] - patch to support road find by name (now thinking about putting this in trunk)

Mon Mar 30 21:19:53 BST 2009

Hi Marko,

> On Mon, Mar 30, 2009 at 08:33:27PM +0100, Mark Burton wrote:
> > Well, we can get snow here way past Easter but not quite in the same
> > league.
> 
> The spring is extraordinarily late this year.  A couple decades ago, we
> used to have some snow even in May, but the last three winters were very
> short, less than a month of permanent snow cover.  I still firmly believe
> in global and local warming: also this winter, the permanent snow fell one
> or two months later than normal, in January.

Well, I'm sure the winters here now are not like they were when I was a
kid. 

> > I admit that I know nothing about how the intersection stuff works. The
> > code we have been trying out simply outputs a data structure that lists
> > the roads in alphabetic order.
> > 
> > By including that data in the map, the gps now shows the find by
> > address and find intersection options. It's the gps that's finding the
> > intersections, not mkgmap.
> 
> Sure.  Without using a debugger, it's like shooting in the dark.  Does
> MapSource or some other software (not firmware) support these find options?
> I only run GNU/Linux, so I don't know what MapSource does or what debuggers
> can do on Windows.
> 

Mapsource doesn't show them.

I use Linux 99.99% of the time but I can run Windoze XP using VMWare
and it works very well for what I need to do. 

> I tried bicycle routing on my Edge 705 tonight, and it worked.  (With
> the usual shortcomings: it didn't recalculate the route until I was
> very much off the route.)  For all intents and purposes, your patch works.
> Please commit it.  The current shortcomings can be documented on the wiki.
> 
> I'd like to release my next Garmin map of Finland with the street name
> data, and I prefer to document the exact revisions of the tools used.
> Uncommitted patches would complicate that.

OK that's a good enough reason to commit it, especially as nobody has
reported any breakage when using the patch.

Personally, I think the search weirdness we are seeing would go away if
we could implement the extra indexing stuff (MDR file?)

The reason I believe that is because I installed the complete NZ mapset
(not produced by mkgmap) on my gps and the road search function worked
just as you would hope. But then I installed a small portion of the map
and the road search then behaved like it does on our maps. So, I think
that the extra file(s) in the mapset alter how the road search works.

Cheers,

Mark