[mkgmap-dev] splitter default resolution 13 and overview map from default style

Wed Jun 2 15:55:00 BST 2021

Hi all

Outermost level should be as Gerd suggests
5 levels of overview seems excessive - what about:

overview-levels = 4:17, 5:15, 6:13

Ticker

On Tue, 2021-06-01 at 13:29 +0000, Gerd Petermann wrote:
> Hi all,
> 
> I am not sure but I think it is a bad idea to have 
> overview-levels = 4:17, 5:16, 6:15, 7:14, 8:12
> in the default style.
> The lowest resolution is 12 while splitter uses the default 13 for
> its resolution. This also means that tiles from splitter are aligned
> to a resolution of 13. The lowest level in the overview map is
> therefore sometimes much more distorted at tile boundaries than the
> next higher. I think it should be changed to 
> overview-levels = 4:17, 5:16, 6:15, 7:14, 8:13
> 
> I've never thought about this relationship between splitter and the
> overview map. Just wondered why my test data looks so ugly at
> resolution 12.
> An alternative would be to remove the lowest level completely.
> Maybe mkgmap should print a warning when tiles are not aligned for
> the lowest resolution used in the map?
> 
> Any thoughts? 
> 
> Gerd
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