[Tilesathome] Level 8 captions

[Sebastian Spaeth]

80n wrote:
>     lowzoom captions are suppressed by the horizontalProximity="0.008"
>     verticalProximity="0.00625" rules in the style sheets that suppress
>     labels that are close to each other. which ones will be suppressed
>     depends unfortunately on the requested area, which means that
>     neighboring tiles can suppress different labels.
> 
>     No, there is nobody who is about to fix this as far as I know.
> 
> 
> Unless I'm missing something, this should be fixable quite easily by 
> just increasing the size of the bbox so that adjacent tiles are using 
> roughly the same data.  For cities at low zoom levels the bbox should be 
> several times larger than the size of the tile to be rendered. 

That's what I thought too. Unfortunately, it doesn't seem to work. The 
current lowzoom captions (at least those that I created) were done with 
a margin of 2 on each side, so I downloaded the area of 5x5 tiles just 
to create one caption tile. There seems to be an "avalanche" effect, 
once it starts suppressing different cities at the borders it will start 
suppressing different cities in the middle too...