[mkgmap-dev] Coastline issues - analysis and possible solution

Mon Aug 29 08:27:05 BST 2011

fixed tiles may produce better coastlines, but you'll get "map too big" 
at some point as the map grows. so you could either set a large safety 
margin and get a lot more tiles or you'd have to fix the tiles anew more 
often.

Am 29.08.2011 09:08, schrieb Bartosz Fabianowski:
>> It still takes a little tweaking to get the coastlines right. I have
>> manually chosen the tile borders so that the coastline will end outside
>> the tile border. Only in the Swedish/Finnish border I am using
>> extend-sea-sectors to make up some coastline in Sweden.
> This is why I collected the coastlines for all of Europe in a single
> file. When all European coastlines are available, you no longer have to
> tweak tile boundaries.
>
>> I think that it could be useful to have the tile-splitter support a set
>> of fixed tiles that it would split itself further as needed.
> I presume you would then use this so that you extract a larger region
> and then let the splitter generate tiles for a subset of this region?
> With a sufficient margin of safety between the two regions, this should
> work by providing the splitter with coastline data even when tiles grow
> due to rounding.
>
> - Bartosz
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