[mkgmap-dev] PATCH v1: highwayCount

Mon Feb 11 06:11:06 GMT 2013

Hi Steve,

I don't understand all of your comments, but I think that either I
missunderstand the code in
RoadDef or something is wrong.
The comment in RoadDef says
 * A road definition.  This ties together all segments of a single road
 * and provides street address information.

but the current implementation works different.
In StyledConverter, we create one MapRoad instance for each segment of 
an OSM way. MapRoad itself creates one instance of RoadDef for this single
segment.
The RoadDef class contains code to handle multiple segments at the same zoom
level.
So, if my assumption is right that the order of segments does matter, we 
should probably make sure that the entries in NET1 appear in the right
order,
or we should not create multiple RoadDef instances for a single OSM way.

Gerd

Steve Ratcliffe wrote
> Hi Gerd,
> 
> I see files where every road has a different subdivision and line
> number, but that need not matter as long as everything matches up.
> 
> I have found a way in which a file compiled with transparent
> is definately broken though. I have a file where the all entries
> in NET 1 are exactly the same (apart from the subdiv/line numbers) -
> they have the same offsets in the file etc.
> 
> However NET 3, which is basically a list of pointers into NET 1,
> is not the same and there are entries that do not point to the
> beginning of a NET 1 entry.
> 
> It may not be the only problem, but I will see if I can find
> out why it happens tomorrow.
> 
> ..Steve
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> mkgmap-dev at .org

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