[Tilesathome] Low Zoom

[Alan Millar]

> The low-zoom for most of Europe is looking a bit sick (well pale and
> spotty), particularly at zoom 6.  Example here:
> http://informationfreeway.org/?lat=46.521368281833375&lon=16.895189840491245&zoom=6&layers=B000F000F
>
> Perhaps the pale rendering is an intentional change (the old lowzoom
> compositing used the "darken" qualifier at each level to increase
> contrast),
> but the blue spots are definitely not a sign of good health.

I believe the pale color is not intentional but just an artifact of the
current basic scaling, waiting for one of us to fix it :-)   I think the
current stitcher also does not composite the lowzoom captions on, at least
when I checked a day or two ago.

I'm in the process of setting up a test tile server environment of my own
so I can help develop fixes for this.  There are a number of hardcoded
items and dependencies which are not obvious at first.  I'm making notes
as I go along.  And then there is that problem of me not knowing python,
django, or cairo.  Well then, it's time to get started...

- Alan