NavList:

One thing this discussion shows is how remarkably accurate the lat and long readout on Google maps, which is presumably tied to WGS84, can be.  If you look for ‘Greenwich Park London’ and then go to Earth and go to maximum enlargement, you can actually see the stainless steel Prime Meridian line.  Place the marker over it and select left click.  You’ll get 51,477881, -0.001502.  Multiply that by 3600 and you’ll get a longitude of 5.41”W.  Thrilled by this I thought I’d enter the figures I posted earlier in the week.  The marker comes about a yard away from the little white table I sat my GPS on, which shows my GPS was considerably more accurate at that instant than the figure it was suggesting.  You’re correct Gary.  You can see where I live.  What’s it like in other parts of the World?  Dave