@Ævar I agree with Richard on this one, I was of the impression that the intent behind using cc-by-sa was to get changes to the raw data to be shared.

@ianlopex115 PD isn't valid in some jurisdictions, so you have to have a copyright license, also choosing licenses may not be in the best interests of OSM-F and/or contributors, eg CC-by may not be applicable in places like the US which is the whole reason this situation exists in the first place.

@ctheile can you please explain to me how the license change would benefit cloudmade, if anything I was under the impression that as Richard said it would possibly make life more difficult since copyright law alone may not work in the US and US companies potentially could use OSM data as much as they like without giving back.

@DiverCTH discussion has been occurring on the legal mailing list, and for longer than you've been registered, not to mention ODBL isn't something OSM cooked up, the ODBL itself is the work of another group.

I think you are completely over reacting, the intent behind ODBL is to cover data where copyright isn't enough, and shouldn't place any more or any less real restrictions on things than cc-by-sa already does.

The devil is in the details and I'd be interested to know specific concerns you have with ODBL, you only seem to be doing hand waving and making empty threats.

There is several algorythms that force the server to re-render tiles, however in most cases the problem is your browser is showing cached tiles.

If you click on the "perm link" link, and then hit ctrl+shift refresh this will force your browser to refresh all the tiles in view, unless the tile server is under heavy load, most changes will be re-rendered within a few minutes of the changes being made.

You should have posted a URL of the location, or at least given the co-ords for it...

Can you give examples of what google can and OSM mapnik tiles can;t?

Yes the mapnik style sheet is unwieldy, but not impossible if you are determined.

I've come up with custom shields + style sheet for Australian shields, feel free to email me if you want more details, or better still join the dev mailing list.

Attempt #2

>Rule>
>MaxScaleDenominator>50000>/MaxScaleDenominator>
>MinScaleDenominator>1000>/MinScaleDenominator>
>Filter>[bridge]='yes'>/Filter>
>LineSymbolizer>
>CssParameter name="stroke">red>/CssParameter>
>CssParameter name="stroke-width">7>/CssParameter>
>CssParameter name="stroke-linejoin">round>/CssParameter>
>/LineSymbolizer>
>LineSymbolizer>
>CssParameter name="stroke">white>/CssParameter>
>CssParameter name="stroke-width">5>/CssParameter>
>CssParameter name="stroke-linejoin">round>/CssParameter>
>/LineSymbolizer>
>/Rule>

I haven't tested any of this, so it may not work, no idea.

How much do you know about modifying the mapnik style sheet?

All you would need to do for a noname layer is add a new layer section, I'd copy the section that makes the sides of bridges, and update the sql query to look for something like this:

select way,(case when "name:ga" is not null then 'no'::text else 'yes'::text) as noname from planet_osm_line
where highway in ('motorway','trunk','primary','secondary','tertiary','residential','unclassified','minor')
order by z_order) as roads

Then in the rendering rules section again copy from a bridge example and do something like this:

50000
1000
[bridge]='yes'

red
7
round


white
5
round

I haven't tested any of this, so it may not work, no idea.

This isn't my presentation, I was just making the information available for others because I thought it was interesting.

Is it possible to take the tag stat data and for any entries that appear X times link to a wiki page?

Great idea!

Although it would be best to link all keys/values to the wiki and highlight them as non-existent to encourage more people to document their usage.

Reading an article about GPL violations it's generally better for everyone to not name and shame, except as a last resort.

This is no different than companies using GPL software, to get access to the map data they agreed they would attribute it properly and make available their changes, if they don't want to do that that's fine they can pay for someone else's map data which they will be bound by license agreement to attribute it properly.

As for public domain, it isn't legal in some jurisdictions, and for this to be a valid argument everyone committing changes in the area would have to agree with it.

Click on the '+' icon in the top right corner, and check the 'Data' check box, then zoom in on the feature. On the left side pane you can select an individual feature and click 'show history'

The trick is to act like you own the place, it's basic social engineering, if you wanted to go a little further you could print up a name tag and put something like "OpenStreetMap Surveyor" under your name.

People only start to be suspicious if you act otherwise.

Let's make what happen specifically?

What username was used for the edits?

Depends what the tile server is up to, they may be rebuilding the database on the OSM tile server so new tiles won't be created.