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What datum (reference ellipsoid) does Google Earth[1] use?

I can't seem to find where Google Earth tells explicitly what datum they use. I need some sort of valid link.

[1] The default free version that you download from Google.

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2 Answers 2

up vote 10 down vote accepted

WGS84, according to:

Cheers, Ryan

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Is it important for this question, that the geoid they use is not a perfect WGS84 geoid, but an EGM96 geoid which is a sphere?!msg/kml-support-advanced/… –  Matthias Kuhn Apr 23 '13 at 7:18
Does Google's also use this datum for its Google Maps Geocoding API? –  craig Sep 13 at 3:17

It is NAD27, according to google support:

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This is incorrect. The page you link to explicitly states: "Google Earth uses Simple Cylindrical projection with a WGS84 datum for its imagery base." –  Fezter Apr 23 '13 at 6:46

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