I should re-phrase my comment, GPS traces are important, but for small
niche parts of the map or brand new developments. I do use GPS, but the
bulk of editing is done from other sources, and I don't mean Bing, there
are loads of sources coming online every day.
In Worcestershire, where the local council make available a TMS service
of the public rights of way and add to that overhead imagery to confirm
where people are actually walking across a field and I've mapped a huge
percentage of the PRoW around here without leaving home. Yes some bits
need an onsite verification but the bulk is armchair.
I'm not ashamed of armchair mapping and all power to those who have the
time and resources to go and survey on foot but the vast percentage of
my mapping time is spent online. If I do ground survey it's when I'm
somewhere for work.
Jonathan
http://bigfatfrog67.me
On 18/11/2013 13:15, Philip Barnes wrote:
Also the area we are lacking at the moment is rights of way, these
are often not visible on satellite imagery and the only way to map
them is to go out and walk them with a GPS.
Phil (trigpoint)
--
Sent from my Nokia N9
On 18/11/2013 13:03 SomeoneElse wrote:
Jonathan wrote:
... but are traces really that important now? They have some uses but
the bulk of sources now and going forward are from other methods?
If "other methods" means "copying from other data sources rather than
actually going out and surveying" then you're never going to get "the
best map", only "a map that is in some areas almost as good as some
others".
For example, yesterday I was here:
http://www.openstreetmap.org/#map=15/53.2346/-0.3269
<http://www.openstreetmap.org/#map=15/53.2346/-0.3269>
Without going there you'd be able to guess at the exent of the
woodland (depending on the age of the Bing imagery) and you'd think
(based on what OS OpenData says) that it's called "Stanfield Wood".
If you go and have a look you can see the correct name ("Stainfield
Wood" - which matches the village to the north), who runs it, and the
fact that it's not open to the public. The actual GPS trace is useful
for helping to spot places where Bing is offset from reality (although
here in flat Lincolnshire it's only a 4-5m at a guess).
Cheers,
Andy
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