Re: [talk-au] New tile rendering server (Experimental)

[David Clark]

Sorry I don't really understand this, how will this affect me and what
I see?

Thanks
David

- Original message -
From: Grant Slater <[1]openstreet...@firefishy.com>
To: "talk-au" <[2]talk-au@openstreetmap.org>,
[3]nzopen...@googlegroups.com
Subject: [talk-au] New tile rendering server (Experimental)
Date: Mon, 22 Jul 2013 18:18:49 +0100

Hi Oceania (Talk-AU and nzopengis),

I have just switched the default OpenStreetMap.org “Mapnik style” map
tiles for tile.openstreetmap.org in the Oceania region across to our
new rendering server.

The new rendering server has been tested and is now ready for
production. We’re migrating traffic over region-by-region and the
Oceania region is the first to go live. The countries in the Oceania
region affected are those with dark green links on this map:
[4]http://dns.openstreetmap.org/tile.openstreetmap.org.html

In addition to new hardware, the rendering server also uses the new
“openstreetmap-carto” stylesheets. These are a complete re-write of
the XML stylesheets to use CartoCSS, making them easier for our
cartographers to work with.

Andy Allan’s great talk at State of the Map US described the reason
for the stylesheet re-write:
[5]http://stateofthemap.us/saturday.html#schedule/saturday/putting-the-
carto-into-openstreetmap-cartography

The map tiles will be slightly slower at medium-high zooms while the
server builds up its cache. The style is designed to look the same as
the current XML stylesheet.

The “openstreetmap-carto” stylesheet is maintained here:
[6]https://github.com/gravitystorm/openstreetmap-carto

Big Thank you to #osm-dev for helping draft this announcement.

Kind regards
Grant Slater
Part of the OSM Sysadmin Team

References

1. mailto:openstreet...@firefishy.com
2. mailto:talk-au@openstreetmap.org
3. mailto:nzopen...@googlegroups.com
4. http://dns.openstreetmap.org/tile.openstreetmap.org.html
5. 
http://stateofthemap.us/saturday.html#schedule/saturday/putting-the-carto-into-openstreetmap-cartography
6. https://github.com/gravitystorm/openstreetmap-carto
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Re: [talk-au] New tile rendering server (Experimental)

[Grant Slater]

On 23 July 2013 15:08, David Clark  wrote:
> Sorry I don't really understand this, how will this affect me and what I
> see?
>

Hopefully you shouldn't see any difference. :-)

It is a large behind the scenes change on how we produce the default
map tiles (view) for OpenStreetMap.org

The old map stylesheet was a mass of difficult to understand XML. The
new map stylesheet is completely re-written in a much cleaner CartoCSS
syntax. Easier to maintain and improve, it is also easier to customise
it for other projects. Andy Allan's talk explains it better than I
could to: 
http://vimeopro.com/openstreetmapus/state-of-the-map-us-2013/video/68093876

We have also changed the server infrastructure used for rendering the
map tiles. The old server was becoming very complicated to maintain
and administer due to the many layers of complexity, code, and
undocumented hacks built up over time. The new server is setup using
an automated "devops" system (opscode chef). The chef cookbook we
wrote is here: http://git.openstreetmap.org/chef.git/tree/HEAD:/cookbooks/tile

Regards
 Grant

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