Re: Google Earth: Elevation of water?
- From: PJ Halls <pjh1@xxxxxxxxxx>
- Date: Tue, 30 Aug 2005 12:54:43 +0100
Terry Pinnell wrote:
%<Snip
Terry,
let's recap. You have noticed extreme variations in altitude for
the surface of Ardingly Lake, in Sussex. You implied in one posting
that the width of the lake is around 50 feet - but now it appears that
you mean that figure represented the variation in altitude?
As has already been commented, there are problems with radar
altimetry over water and a variety of 'fixup' methodologies are commonly
applied to correct these. I have a version of the SRTM data for the
British Isles here: if you could give me a better indication of where
the lake is - OSGB grid reference would be fine - I will happily take a
look at the elevation data ... it may well be that the version I have
has a different processing history to that used for Google Earth - but I
do have access to that log for my version of these data.
> Maybe you misread my post. I was asking why GE reported a small lake's
> surface at 'elevations' varying widely (50 ft or so) across a few
> hundred feet horizontally. I was guessing it must be reporting
> *ground* elevations.
Best wishes,
Peter
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