[Tilesathome] Tile retries

[Joost Overes]

>> A solution is to rearrange the zoom-level default and lowzoom layers. So 
>> lowzoom from 6 to 12 and default from 13 tot 17, but then a lot of other 
>> things need to change, mostly website's.
> it's not *that* easy. if you make z12 a lowzoom  level, a lot of the 
> details
> will be missing as we only download a subset of data for this.

Or an other way off course. Add an extra layer called highzoom.



>> Or probably  a much easier way to change the t @ h tilesgen.pl script to 
>> split the level 12 zoom to 4 level 13 zoom tiles and process these 4 
>> pieces sequentially. (And render zoom-level 12 as a kind of 
>> lowzoom-level?)

> if you split a z12 tile in 4 z13 tiles you will get into trouble with
> all kinds of overflowing names (eg city names) and areas which are
> larger than the tile, eg large forest areas.

Why are the names turning up right at z12? And why wouldn't they at z13? 
(Look at 2098,1349 ; 2099,1349 ; 2098,1350 ; 2099,1350 the word "Leiden" is 
divided over 4 z12-tiles)

I mend instead op downloading a z12 tile, you download 4 z13 tiles (the same 
way as z12 tiles but only smaller area's)



Inkscape is now the limiting factor for rendering tiles at z16/z17 with a 
lot of nodes in it.

So we must look for an alternative way of handling the rendering of the 
tiles or use another svg2png program.