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There's been an on-going question about whether it is legal to display data derived from Ordnance Survey licenced mapping via google maps.

By derived data, I mean geometries which have been copied exactly from, or are composed of parts from, another dataset.

The blog post here: http://blog.ordnancesurvey.co.uk/2010/08/what-the-psma-really-means/ outlines the issue.

We've spoken to Google and they say that the OS have recently relaxed their licencing, but haven't been able to get any comment from the OS. The last post on the OS blog is from November 2012.

Does anyone have any ideas as to how the land lies here? Particularly if anyone has heard anything from the OS on this subject since November 2012.

UPDATE: 16th April 2013: We've got an account manager at the OS now and a collegue has just spoken to him. Long story short: nothing has changed since November 2012 - any data derived from OS licenced mapping which is not specifically "free" (such as OS OpenData) may not be displayed in Google maps. Our account manager didn't know when the OS was going to come back with an answer. He said he'd chase it up. *starts holding breath*

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Bing Maps do this - but they have paid Ordnance Survey to do so. (£100,000's in licensing) see bing.com/maps/… (&sty=s) switches to os maps – Mapperz♦ Mar 14 at 13:57
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I have asked the Ordnance Survey directly - twitter.com/mapperz/status/312201556147707905 – Mapperz♦ Mar 14 at 14:01
Thank you for tweeting that! – GHC Mar 14 at 15:23
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They've tweeted back - Ordnance Survey‏@OrdnanceSurvey @mapperz we're aware of recent changes to Google’s Premier licensing terms & these are now under review, we'll update once review completed - this is basically what they said back in November... – GHC Mar 15 at 11:37
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for other users the direct timeline tweet from Ordnance Survey GHC mentions is twitter.com/OrdnanceSurvey/status/312498284642070528 - shows social media does work.. (it's the fastest reply ever from os). – Mapperz♦ Mar 15 at 13:43
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I wouldn't trust anyone but a lawyer on this one.

Google's Terms of Service can be interpreted to mean that if you display any data on top of Google Maps/Earth, Google gains copyright over it.

Ordinance Survey holds the copyright over their data and any derived data. They say that you do not have the right to pass over the copyright to Google.

Only a lawyer can truly help you out, but in my opinion, Ordinance Survey is right, and you shouldn't listen to Google's sales team.

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Indeed, we'd not do anything without either i) legal advice or ii) clear guidance from the OS. I'm interested in whether anyone has heard anything new on this issue since November 2012. – GHC Mar 14 at 10:28
I haven't; You should ask the person that you talked to at Google. Maybe they could give you the Document/Press release that details this change. – Devdatta Tengshe Mar 14 at 10:31
I've updated the question to make this clearer. +1 for feedback though. – GHC Mar 14 at 10:39
Google can't "do" anything with data that is viewed as they have no access to the data you serve in a webpage unless the data sits at root or transfers through download. If they or others derive their own content from viewing your data and updating their own data that would be illegal, at least in the US – lewis Mar 19 at 18:26
@lewis Hmm. I'm not sure about that. If you display a kml file the Google servers will download the data and tile up raster images for it, at least that is my understanding of it. Also the Google maps api is obfuscated so it's difficult to tell what is going on under the hood. Anyhow, technicalities aside, if we're not allowed to use the service legally with os derived data, it becomes a moot point! – GHC Mar 19 at 19:25
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