[mkgmap-dev] Overview map for Africa

Thu Mar 28 18:28:27 GMT 2013

Sounds good Wanmil,
a separate style file for generating the overview map is also a good thing.
I have succesfully updated the overview maps for my Europe maps with the patch, it is already an improvement
to see no blank maps anymore when zooming out!

Wanmil wrote:
> What about the following ideas:
> 
> 1. Retrieve the data from the highest instead of the lowest level. The
> lowest level often contains fragmentary data, e.g. have a look a the
> boundaries in your example image
> http://gis.19327.n5.nabble.com/file/n5754697/africa_overview.png
> The data could be merged so that long ways are created that do not
> fall
> through the filters (DouglasPeucker etc.). The MapReader.linesForLevel
> and other methods must have filters that returns only selected garmin
> id
> types.
> 
> 2. Use a separate overview style file and fetch the Garmin ids out of
> it. Then use these Garmin ids to build the overview map. I think the
> overview map should be configurable (one likes to see motorways,
> others
> like to see rivers etc.)
> Maybe it would also be possible to add a special overview statement or
> use special overview levels in the normal style files to achieve the
> same.
> 
> 3. In case --precomp-sea parameter is set the data from an additional
> file in the precompiled sea folder is used.
> 
> WanMil