[Talk-GB] OS 1:25K tracing

Jason Cunningham jamicuosm at googlemail.com
Fri Jan 22 12:01:09 GMT 2010

 I think we should be printing off maps and using them during walks. Mark
whats there, or not, with a highlighter pen.

Havent used 1:25K maps yet, but I have compared them using google when a
similar issue arose a couple of days ago. Its clear a huge amount of changes
have happened and it would be stupid to simply trace.

We can't trace over google/bing satelite imagery because contract/terms of
use, but it is tempting use the google satellite images to check what can be
traced from the 1:25K (still the chance google is out-of-date!). This
doesn't appear to go against google's terms of use.


2010/1/21 Steve Hill <steve at nexusuk.org>

> Since the out of copyright 1:25K maps appeared, there has been rather a
> lot of tracing going on.  On the whole, I think the availability of this
> data is good.  However, I have noticed that around the Gower peninsula,
> quite a few nonexistent roads, etc. have appeared and have been attributed
> to these maps.
> I'd like to take the opportunity to point out that blindly tracing fairly
> old maps without doing any kind of a survey is pretty counterproductive -
> someone now has to go around and survey and delete these bogus features.
> By all means, trace the maps to add stuff you know is there, but please
> don't just trace everything without some local knowledge.
> --
>  - Steve
>    xmpp:steve at nexusuk.org <xmpp%3Asteve at nexusuk.org>
> sip:steve at nexusuk.org <sip%3Asteve at nexusuk.org>   http://www.nexusuk.org/
>      Servatis a periculum, servatis a maleficum - Whisper, Evanescence
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