Google Earth to find POI's?

[voice_of_reason]

I was wondering the other day if this might work......

Has anyone tried identifying a particular POI that they're interested in using the satellite maps on Google Earth (assuming it goes down to clear street level detail for the area you're interested in), noting down the latitude/longitude that Google Earth gives you, and then using the techniques mentioned in other threads elsewhere on this forum to convert those coordinates to a point on the Navigator map and save it as a POI?

Might be a nice way to pinpoint/check new POI's that would otherwise be difficult to identify.

Just a thought.......

[Masked-Marauder]

The prime meridian on google earth is about 8 seconds out, it is too far to the East. It should run slightly to left of centre through the group of buildings on the left (The Greenwich Observatory) in the photo. The Prime Meridian is the yellow line.



So no, I have not tried it!

[rleeden]

There at least three 'official' meridians:

The zero meridian used by satellite navigation systems (on the WGS84 datum) is about 100 metres to the east of the line marked at Greenwich. It is not fixed on the ground as the continents are moving because of continental drift, and the WGS84 datum is an average of the various continental movements - the datum stays where it is and the continents slide around underneath it. (Otherwise a minor earthquake in Greenwich could change longitudes throughout the world.)

Also, the zero meridian used by the Ordnance Survey (OSGB36 datum) is about six metres to the west of the line marked at Greenwich. This was the standard meridian before 1851, and the Ordnance Survey simply carried on using it.

And finally, The Prime Meridian is the meridian (line of longitude) passing through the Royal Greenwich Observatory, Greenwich, England; it is the meridian at which longitude is 0 degrees.
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