[OSM-talk] Osmarender4 slippy map (preview)
80n80n at gmail.com
Fri Feb 9 14:30:29 GMT 2007
On 2/9/07, Frederik Ramm <frederik at remote.org> wrote:
> with some help from Jochen I have now managed to use Osmarender4
> with the tiles at home scripts to generate slippy map tiles. I have
> rendered portions of Karlsruhe, London, and Cambridge, and put them
> on a slippy map for you to view:
> For a better old-new comparison, the "+" layer switch button in the
> top-right corner can be used to switch between the old Osmarender map
> (from the dev server) and the Osmarender4 tiles provided by my server.
Looks very good to me.
The styles (XML files for Osmarender4) that have been used can be
> downloaded here
> I have tried to emulate the look of the old maps as far as possible;
> some things still look different because Osmarender4 renders things
> that were previously ignored, and I fiddled around a bit to make it
> look ok.
> (Among the major changes are, as far as I remember, bridges/tunnels,
> light rail+tram, much better text rendering along streets - where
> still imperfect, that's often due to wrong order of segments - and
> rendering of unwayed segments at zoom levels 14 and finer.)
> I would like to get the Osmarender4 modifications for tiles at home into
> production use as soon as possible. The tiles are similar enough not
> to force us to re-render the whole world at once when that happens,
> but I guess there will nonetheless be an effort to replace old-style
> tiles quickly. I will deploy the changes to SVN, and participiants in
> the tiles at home rendering will then be asked to upgrade their
> software. (@OJW: do you think we should add a version parameter to
> the upload script, so that the API can reject uploads with missing/
> too old version code?)
> I think there are quite some strange things about the slippy map
> layout as it is currently, especially the change in style between
> levels 13 and 14,
This is basically just a matter of unfinished work. I revamped levels 12
and 13 to look more optimal but have not yet had the time to rework levels
14 through 17. They are all based on the original rules file and have not
been adjusted to look their best at each level.
but also some font size decisions and what is and
> is not rendered at various zoomlevels. However, I would rather not
> get into a full-blown discussion about that now (perhaps a good thing
> to discuss at the proposed Oxford meeting?); for now, I really opt
> for emulating the existing style without thinking too much about it.
> Otherwise we'll never get the Osmarender4 slippy map off the ground.
> So my question to you is: Do you see anything in the above examples
> that is uglier than it was before, or so different that it breaks
> something, or any other reason why we shouldn't go ahead with this?
Letter boxes are now being rendered which is good, but they use the same
icon as post offices which is bad. But this is a minor point, don't let
this hold you back.
> Frederik Ramm ## eMail frederik at remote.org ## N49°00.09' E008°23.33'
> talk mailing list
> talk at openstreetmap.org
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