On 8/2/2016 3:37 PM, Andrew Davidson wrote:
WGS84 is a datum fixed; as in dated 1984 and the data does not change.
I'm not sure that you've understood exactly what a semi-dynamic datum
is. Have a read of this:
http://ceur-ws.org/Vol-1142/paper6.pdf
particularly sections 3.4 and 3.5.
I'm
I found this explanation helpful
http://www.geoproject.com.au/gda.faq.html#q16
On Tue, 2 Aug 2016, at 01:57 PM, Andrew Davidson wrote:
> What to do about it? Unfortunately the changeover to GDA2020 is not
> going to happen overnight, the plan is for a three year transition
> starting in 2017.
WGS84 is a datum fixed; as in dated 1984 and the data does not change.
I'm not sure that you've understood exactly what a semi-dynamic datum
is. Have a read of this:
http://ceur-ws.org/Vol-1142/paper6.pdf
particularly sections 3.4 and 3.5.
Or you have access to survey points/marks and
On 8/2/2016 1:57 PM, Andrew Davidson wrote:
It's interesting because it highlights one of the foundation myths of
OSM; which is that it uses the "WGS84" co-ordinate system. This is a
convenient myth and if you're talking about only mapping to the
nearest 5m then it is in effect true. However,
It's interesting because it highlights one of the foundation myths of
OSM; which is that it uses the "WGS84" co-ordinate system. This is a
convenient myth and if you're talking about only mapping to the nearest
5m then it is in effect true. However, once you start talking about
sub-metre
On 7/30/2016 1:57 PM, Andrew Harvey wrote:
On Sat, 30 Jul 2016, at 08:40 AM, Warin wrote:
The change, distance wise, is upto 1.5 metres, well within commercial
GPS uncertainties.
The change is to the datum. How this will work out with future global
datums we will have to wait and see.
In
On Sat, 30 Jul 2016, at 08:40 AM, Warin wrote:
> The change, distance wise, is upto 1.5 metres, well within commercial
> GPS uncertainties.
>
> The change is to the datum. How this will work out with future global
> datums we will have to wait and see.
>
> In another 30 years there will
On 7/29/2016 10:40 PM, Andy Mabbett wrote:
See you when you reach England ;-)
http://www.bbc.co.uk/news/technology-36912700
But seriously: what impact might this have, on OSM?
Very little!
The change, distance wise, is upto 1.5 metres, well within commercial
GPS uncertainties.
The
See you when you reach England ;-)
http://www.bbc.co.uk/news/technology-36912700
But seriously: what impact might this have, on OSM?
--
Andy Mabbett
@pigsonthewing
http://pigsonthewing.org.uk
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