[mkgmap-dev] mkgmap creates polygons that break Mapsource panning and also routing in some zoomlevels as well as crashing the GPS

Thu Sep 3 01:42:53 BST 2009

*a)
*First of all Mapsource >=6.14.1 is not affected. Problem exists on 
<=6.13.7. And my Vista HCx crashes on trying to zoom into this map and 
restarts. (this is after a master reset, so it's the map not the GPS). I 
do assume that Nuvi and other modern units will take the maps without 
crashing.

I have not found out which polygon is responsible for this, and I don't 
really understand it. The problem may be partly related to the extended 
types, but the extended types themselves are not the reason for 
Mapsource crashing on certain zoomlevels. You can download the broken 
tile here and look at it to find out if you find the problem.
What I found out so far:
I am using the following "problematic" lines in my style-file:

leisure=*  & fixme!=yes & import!=*                            [0x2a 
resolution 24]
tourism=*  & fixme!=yes & import!=*                            [0x2b 
resolution 24]
sport=* & fixme!=yes & import!=* &sport!=skiing &sport!=ski        [0x2c 
resolution 24]
landuse=* & landuse!=commercial     & fixme!=yes & import!=*     [0x2d 
resolution 24]
natural=*  & fixme!=yes & import!=*                            [0x2e 
resolution 24]
amenity=*      & fixme!=yes & import!=*                        [0x2f 
resolution 24]

1. If I drop these lines (which not include extended polygons everything 
runs fine)

2. Using them AND using a typfile with extended polygon types mapsource 
will not pan over this tile from 1-3km resolution (medium detail) --> 
notice that the problematic lines in question are not even supposed to 
be included in level 20 (=mapsource 1-3km).

3. Without Typfile or with typfile without definitions of extended 
polygon types everything is allright and I can pan over this tile.

You can download the tile including typfile from here for analysis, and 
if you feel brave tryout also on GPS (mine crashes but no damage, your 
mileage may vary): *_http://openmtbmap.org/downloads/gmapsupp.zip_*
It is crashing if I put map-detail on GPS to medium, zoom in to 2km or 
1.2km, and then try to pan through the tile from northern tileborder 
(middle between east/west) to the south. In the south of the map 2km 
zoom level is perfectly fine, also on the side boarders (the area broken 
in Mapsource is the same where the gps crashes).

Maybe the problem is completely unrelated to the extended types, but I 
think it has something to do with the extended types.

*b)*
Everyone intending to use extended types for Polygons please keep care. 
Mapsource will not zoom and pan the map upon putting some extended 
polygon types into the map.

*Breaking Mapsource panning completely, also breaks routing:*
0x1102?
Will also break Mapsource panning without typfile if present. Don't ever 
use theese types. (and probabely many others).
*
*

*Working without problem (as far as I can tell).*
0x1100?
0x1101?
0x10f1?
0x10f0?

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