[Talk-GB] Surrey County Air Survey

[Jerry Clough - OSM]

Apologies, again, for top-posting.

I'd echo Wilf's comments. There is a huge amount of detail which can be added without worrying over much about the precision of the alignment. It's possible to identify pedestrian crossings, traffic lit junctions, one-way signs on roads (& in car parks) etc., etc. I was even able to check that the road I used to live on does indeed now have a paved surface: the Yahoo images just weren't clear enough.

My one plea is for more assiduous use of the source tag. Surrey now has some of the densest mapping created over several OSM eras, and now has probably the richest source of imagery (Yahoo, this, OS StreetView, NPE, some Provisional edition maps...) anywhere. Its hard to make even minor changes when detective work is required to know the derivation of existing map elements.

Jerry




________________________________
From: Graeme Wilford <gwilford at gmail.com>
To: talk-gb <talk-gb at openstreetmap.org>
Sent: Sun, 2 May, 2010 16:27:39
Subject: Re: [Talk-GB] Surrey County Air Survey


On 1 May 2010 17:47, Jonathan Bennett <openstreetmap at jonno.cix.co.uk> wrote: 

[...]
 
The imagery is fantastic. I've already been able to draw some complex
>>road junctions far better than I could with traces alone. You and all
>>the other people who have made this available have done an amazing job,
>>and it will put OSM data in Surrey level with, and in some places ahead
>>of Ordnance Survey. Let's just not pretend that it's impossible for
>>there to be positional errors in it.

This does look a good source and I've been using it to tidy up and add detail to many of my previous edits.  Anyone know it's vintage? Looks to me like it's a couple years old; sometime mid 2008?

Cheers,
Wilf.


      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk-gb/attachments/20100502/d5ec6e4f/attachment-0001.html>