[mkgmap-dev] overview map

Fri May 31 07:58:41 BST 2013

Hi Gerd,

congratulations! Great work!
A big thanks also to Steve who implemented the basics some time ago!

I think it's worthy to add a news to the mkgmap homepage, isn't it? 
http://www.mkgmap.org.uk/news/

Have fun!
WanMil

> Hi all,
>
> finally I've merged r2629 into trunk.
>
> A brief description of the changes:
> 1) new or changed options
> --overview-levels
>    like levels, specifies additional levels that are to be written to the
>    overview map. Counting of the levels should continue. Up to 8 additional
>    levels may be specified, but the lowest usable resolution with MapSource
>    seems to be 11.
>
> --remove-ovm-work-files
>    If overview-levels is used, mkgmap creates one additional file
>    with the prefix ovm_ for each map (*.img) file.
>    These files are used to create the overview map.
>    With option --remove-ovm-work-files=true the files are removed
>    after the overview map was created. The default is to keep the files.
>
> --polygon-size-limits=limits code
>    Allows to specify different min-size-polygon values for each resolution.
>    Sample:
>    --polygon-size-limits="24:12, 18:10, 16:8, 14:4, 12:2, 11:0"
>    If a resolution is not given, mkgmap uses the value for the next higher
>    one. For the given sample, resolutions 19 to 24 will use value 12,
>    resolution 17 and 18 will use 10, and so on.
>    Value 0 means to skip the size filter.
>    Note that in resolution 24 the filter is not used.
>
> 2) Optimizations:
> - The polygon filter allows larger polygons.
> - SeaGenerator generates fewer "sea-only" and "land-only" polygons when
>    precomp-sea is used.
> Both reduce the img size, esp. for maps containing large "sea only" areas.
>
> 3) Changes regarding styles:
> - The support for the out-aged map-features.csv file was removed
> - Level ranges can now use min-max or max-min
> - Usage of polygon type 0x4a will be flagged with --check-styles
>
> 4) Other changes
> - A few checks are performed regarding the plausibility of the given options
> and input files
> to help beginners.
>
>
>
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>
> --
> View this message in context: http://gis.19327.n5.nabble.com/overview-map-tp5763471.html
> Sent from the Mkgmap Development mailing list archive at Nabble.com.
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