Originally Posted by
DaveReidUK
I can't vouch for the accuracy of GE's terrain elevations.
GE seems to use a radar satellite survey with 30m vertical resolution on a 90m grid. Some areas are much better with a laser survey. I guess this case is likely to be a radar area.
https://www.quora.com/How-accurate-a...n-Google-Earth
https://productforums.google.com/for...th/3Th8MuHzKtE
https://dds.cr.usgs.gov/srtm/version...PDF-89020B.pdf
PERFORMANCE SPECIFICATION DIGITAL TERRAIN ELEVATION DATA (DTED)
(their caps)