[mkgmap-dev] overview map

Fri May 31 15:44:42 BST 2013

This is great news.  The overview map was one of the biggest deficiencies in mkgmap until now.

So thanks to Gerd and well done.

Also a lot of bugs have been fixed along the way, so I would like to acknowledge that too.

I will put up a news item on the website this evening and push out notices to freecode.

..Steve 

GerdP <gpetermann_muenchen at hotmail.com> wrote:
>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.
>
>
>
>
>
>
>
>
>--
>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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