[mkgmap-dev] How to track an error in OSM data ? (and style's behavior, error) (David)

Mon Aug 1 20:38:38 BST 2011

David,

> To Chris and Wanmill,
>
> I know the need to add "continue" rule to apply the next filter on data.
> But the fact is it does not seem to work as expected at least with
> "landuse=forest" and "natural=wood" with Ireland PBF file (splitted with
> splitter r2009 and compiled with mkgmap r2009). I do not have any clue,
> only a temporary solution.

Please send your style file and describe more detailed what's wrong with 
the map. What do you expect and what do you see instead?

>
> But the biggest trouble is still the corrupted map generated for
> Northern Ireland around Belfast with a huge commercial area polygon
> displayed in levels 0 and 1. Basecamp can display the map without any
> problem at all zoom and detail levels. My first idea was an error in OSM
> file, but I cannot find bad data. It looks like a bad result with early
> generate-sea option development (at least one year ago).

Important: how do you split your OSM data. Do you use the tile splitter 
or do you use any other method like osmosis or the OSM composer?

Please follow Torsten Leistikows hint how to find the OSM id of the 
wrong polygon. If this is a multipolygon you will get non OSM ids > 
4611686018427387904.

WanMil

>
> Regards,
> David
>
> Le 01/08/2011 13:00, mkgmap-dev-request at lists.mkgmap.org.uk a écrit :
>> Am 31.07.2011 12:32, schrieb WanMil:
>>
>>>> >>  I also found an error in a style file for forest polygons. You have to
>>>> >>  write the rules like this if you want the result expected :
>>>> >>
>>>> >>  landuse=forest&  wood=coniferous [0x54 resolution 18]
>>>> >>  landuse=forest&  wood=decideous [0x50 resolution 18]
>>>> >>  landuse=forest&  wood=mixed [0x55 resolution 18]
>>>> >>  landuse=forest&  wood !=* [0x50 resolution 18] /*this line is applied if
>>>> >>  no data matches the ones above*/
>>>> >>
>>>> >>  and not like that :
>>>> >>
>>>> >>  landuse=forest&  wood=coniferous [0x54 resolution 18]
>>>> >>  landuse=forest&  wood=decideous [0x50 resolution 18]
>>>> >>  landuse=forest&  wood=mixed [0x55 resolution 18]
>>>> >>  landuse=forest [0x50 resolution 18]/*this line overrides the ones above*/
>>> >  As far as I know all rules after the first
>>> >  matching line with a garmin id are skipped unless you add a continue
>>> >  statement. So the default style should be correct.
>> Yes. mkgmap stops at the first matching rule.
>>
>> Exeptions:
>>
>> Action rules ( example : maxspeed=DE:urban {set maxspeed=50} )
>> and the continue-statement:
>>
>> barrier=fence [0x34 resolution 24 continue]
>>
>> Chris
>>
>>