[OSM-dev] Slippy Map, automatic Tile Rendering

Dirk-Lüder Kreie osm-list at deelkar.net
Sat Jan 20 03:37:27 GMT 2007

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Frederik Ramm schrieb:

> I have played around with the Perl ImageMagick module and created a new 
> version of lowzoom.pl 
> I used ImageMagick to apply the kind of "boldening" that I described in 
> my last post. I found that the results looked best if levels 11 and 10 
> are created as they are now, but for levels 9, 8, and 7 a correction is 
> applied to keep the lines from becoming too faint.
> http://www.remote.org/frederik/tmp/tiles/comparison.html
> I agree with those of you who said that the ideal way to generate *all* 
> tiles is rendering them directly, and filtering out everything that 
> should be omitted on a certain zoom level. We should keep this aim in 
> mind for the long run, but what you see on the above web page could be 
> in the slippy map within days if it finds favour.

I'd suggest starting at level 8 instead of 9 for the "boldening", this
way it still looks very crowded.

> So please take a look at it and give me some feedback. If there's no 
> objection then I'd like to re-generate the slippy map tiles based on the 
> "right column" method shown on the web page during the following week. 
> There would be a period of approximately 24 hours where tiles of the new 
> and old version co-exist which will look funny, but it'll go away quickly.

I'd be willing and probably able to help there, so we should divide up
the world between us (I always wanted to say something like this ;-)).

Dirk-Lüder "Deelkar" Kreie

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