[mkgmap-dev] Incorrect runabout exit indication

Sat Oct 4 08:38:35 BST 2014

Hi Johan,

v3 and v4 are new style with two different program options,
v5 and v6 are slightly modified new style maps with the same options.

More detailed:
If you watch your map, you see that Garmin shows major roads
with other colors and bitmaps compared to smaller roads. 
This is done because the img file contains information about
the "type of road". The roundabouts are special, because Garmin
only has one type "roundabout", so normally, it displays the roundabout
for a major road with the same color and bitmap as one for a small road.
The "new style" tried to use a "trick": It stores the roundabout  once as
roundabout, once as a normal street, so that the device shows the correct
color and bitmap, but obviously this confuses the algo in your device.
The v5 and v6 versions don't contain this trick.

AFAIK Garmin maps never use this trick, so I fear we can't blame the Garmin algo
for being confused.

@Minko, Lambertus: 
I'd prefer the map without the trick, it is smaller and less likely to confuse the routing.

Gerd

We know that Generic Routable (old style) maps compiled by Lambertus’s site work correct.
We know that Generic Routable (new style) maps compiled by Lambertus’s site cause problems.

The test maps you send me… are they all new style maps?

Here are the results of the 4 maps samples you sent me:
**********************************************
v3 – the icon indicating the relative position for exiting the roundabout is INCORRECT(a relative position indicating one roundabout exit LATER than the correct exit) v4 – the icon indicating the relative position for exiting the roundabout is INCORRECT(a relative position indicating one roundabout exit LATER than the correct exit) V5 – the icon indicating the relative position for exiting the roundabout is CORRECT

V6 – the icon indicating the relative position for exiting the roundabout is CORRECT

Greetings
Johan     From: mkgmap-dev-bounces at lists.mkgmap.org.uk [mailto:mkgmap-dev-bounces at lists.mkgmap.org.uk] On Behalf Of Gerd Petermann
Sent: 4. oktober 2014 08:29
To: mkgmap-dev at lists.mkgmap.org.uk
Subject: Re: [mkgmap-dev] Incorrect runabout exit indication Hi Minko,

thanks for the info. I am pretty sure that this "trick" is the cause of the problem,
but I am not sure if mkgmap can be improved to handle it.

If I got it right, the additional roads with access=no are also handled by the adjust-turn-headings
option, so maybe they are only causing trouble here.

I don't know if (or how) I can configure my Oregon to show the problem, so I've created more
test maps for Johan:

v3: java -jar mkgmap.jar --route --index --gmapsupp --style-file=d:\mkgmap-style-sheets-read-only\styles\world wrong-exit.osm
v4: java -jar mkgmap.jar --route --index --gmapsupp --adjust-turn-headings --style-file=d:\mkgmap-style-sheets-read-only\styles\world wrong-exit.osm
both with the original style files .

v5: java -jar mkgmap.jar --route --index --gmapsupp --style-file=d:\mkgmap-style-sheets-read-only\styles\world wrong-exit.osm
v6: java -jar mkgmap.jar --route --index --gmapsupp --adjust-turn-headings --style-file=d:\mkgmap-style-sheets-read-only\styles\world wrong-exit.osm
both with a modified lines file (removed the "continue with_actions" for the roundabouts)

@Johan: Please check all 4 versions

Gerd

> Date: Fri, 3 Oct 2014 17:56:44 +0200> From: ligfietser at online.nl
> To: mkgmap-dev at lists.mkgmap.org.uk
> Subject: Re: [mkgmap-dev] Incorrect runabout exit indication
> 
> Gerd,
> The new styles for Lambertus you can find here:
> https://code.google.com/p/mkgmap-style-sheets/source/browse/#svn%2Ftrunk%2Fstyles%2Fworld
> 
> The issue could be that there are two lines used for roundabouts:
> 
> https://code.google.com/p/mkgmap-style-sheets/source/browse/trunk/styles/world/lines
> 
> First step, an invisible routable line for the roundabouts 0x0c
> 
> 
> # Roundabouts
> junction=roundabout & highway=trunk [0x0c road_class=3 road_speed=2 resolution 18 continue with_actions]
> junction=roundabout & highway=primary [0x0c road_class=3 road_speed=2 resolution 19 continue with_actions]
> junction=roundabout & highway=secondary [0x0c road_class=2 road_speed=2 resolution 20 continue with_actions]
> junction=roundabout & highway=tertiary [0x0c road_class=1 road_speed=1 resolution 21 continue with_actions]
> junction=roundabout & highway=unclassified [0x0c road_class=1 road_speed=1 resolution 21 continue with_actions]
> junction=roundabout & !(highway=unclassified|highway=tertiary|highway=secondary|highway=primary| highway=trunk) [0x0c road_class=0 road_speed=1 resolution 22 continue with_actions]
> 
> 
> Second step, all roundabouts are made unaccessible after 0x0c is processed, in order to prevent two routable lines on top of each other:
> 
> junction=roundabout {set access=no}
> 
> 
> Third step (continue with_actions) the highways are rendered, so you can see a difference in road classes on those roundabouts.
> The default mkgmap style (=Lambertus 'old style') renders all roundabouts the same.
> 
> I think Johan's nuvi gets confused by those two routable types?
> 
> 
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