wwp@yahoogroups.com:
Re: Previous Coordinates Question
Robert Bilsland 2007-Aug-12 17:47:00
Landis,
Thanks for your reply and explanation of the Meridian. I had always
wondered why that line didn't line up but all the Trig Points I
checked did. The thing that brought this to mind was the fact some of
my friends had found my WWP entries on Google Earth and commented on
how they were slightly out! I had already spent plenty of time looking
around the higher resolution imaging, but had forgotten to look back
at my previous entries.
Thanks again,
Bob.
--- In #removed#, Landis <landis@...> wrote:
>
> Yes, that certainly does look strange. Perhaps Google should have
> accurately named the line they call the Prime Meridian as the
> International Reference Meridian. The 0 Longitude line in Google
> Earth is based on the WGS 84 datum which is what is used on the
> majority of GPS receivers (it's the native system for GPS) and this
> model puts the Greenwich Meridian Line 102.4779 meters to the west of
> the IRM 0. There's a really good explanation of this at the
> Flamsteed Astronomy Society: http://www.flamsteed.info/faswgs84.htm
>
> The Prep Server is currently down. We'll see about getting it open
> again for editing coordinates on all previous events and hopefully
> everyone can take a look at their contributions and offer any
> corrections.
>
> -Landis
>