>So, where does Google Elevation stand? We don’t quite know.
All we know is that Google uses multiple data sources, ranging from LiDAR to SRTM to some other unknown sources. We do know that Google doesn’t use surveyor data.
But it should be noted that Google starts to use LiDAR since some 8 years ago, at some places, which gives it a vertical accuracy of 5~25cm error. Unfortunately Google doesn’t want to disclose at where. 8 years have passed, so now the data accuracy can only improved.
>For the places that Google doesn’t use LiDAR, SRTM ( or the interpolations) steps in. The accuracy would be significantly less.
OK, I don't feel the Giza Plateau is using this amount of accuracy. I still stand by my estimate of 15 to 30 feet. A 5-25cm is really small. 25cm is not even 1 foot, (.82). Plus, I was told the Government asked Google, no to allow this much accuracy, as the area has Military importance.
Where did I hear that... From a Company, who has a Satellite, and which sells their information, at higher resolutions.