[OSM-talk] augmenting contour data with gps track logs
Anthony
osm at inbox.org
Tue Dec 29 14:50:09 GMT 2009
On Tue, Dec 29, 2009 at 12:01 AM, Liz <edodd at billiau.net> wrote:
> There are many sources of error in SRTM and GPS and barometric height
> measures.
> First of all
> Height compared to what?
>
WGS84 adjusted by the deviation between WGS84 and EGM96 at the lat/lon of
the measurement? Would that work?
A fast bicycle descent wrecks the height calculation because the processor
> is
> too slow.
>
Could that be resolved by asking it to output raw WGS84 altitudes and then
doing the calculations to adjust it to MSL offline?
Just questions. I don't know enough about this stuff to have the answers.
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