[OSM-dev] Proposal for new tiles at home lowzoom method

80n 80n80n at gmail.com
Tue Jan 8 13:24:55 GMT 2008


On Jan 8, 2008 1:07 PM, Andy Allan <gravitystorm at gmail.com> wrote:

> On Jan 8, 2008 12:39 PM, 80n <80n80n at gmail.com> wrote:
> > Folks
> > I've been experimenting with a different method of generating lowzoom
> tiles
> > for tiles at home.
> >
> > The approach I am taking is to use the old tile stitching method coupled
> > with a separate place name layer.
> >
> > The tile stitching starts with a layer of z12 tiles that are the same as
> > normal z12 tiles except the main roads are about 50% thicker and it
> there
> > are no place names.  You can get a rough idea of what that will look
> like by
> > looking at the the current lowzoom tiles for the US - most of it was
> > rendered using the old stitching method before many place names had been
> > added.
> >
> > I then propose a separate transparent layer for place names.  This
> > potentially allows for multiple name layers for different scripts and
> > languages.  I've heard some comments that  transparent layers are not a
> good
> > solution - I'd be interested in understanding the pros and cons of doing
> > this.  The alternative is to merge the transparent layer with the
> lowzoom
> > tiles using Image Magick, which would achieve the same visual result but
> > without the ability to dynamically switch the language.
> >
> > I've started doing some test renderings in the south of England,
> although
> > there is not really enough there yet to get a good feel for what it
> would
> > look like:
> >
> >
> http://www.informationfreeway.org/?lat=50.87948576831506&lon=-0.8263735442015004&user=80n&zoom=11&layers=0000F00BT
> >
> > At this stage I'd appreciate any comments or suggestions.
>
> I'd prefer everything to be embedded onto the tiles themselves, since
> it makes it much easier for people like me reusing the tah tiles on
> other maps.
>

If necessary we could do it both ways.




>
> Cheers,
> Andy
>
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