[FOSS-GPS] GPS issues for Ethiopia

António Pestana afsm.pestana at gmail.com
Thu Oct 25 09:04:06 PDT 2012

> The idea is to do some relative measurement for the vertical component.
Even so topographic/geodetic levelling can be mandatory. Relative GPS
heights measurements can be grossly misleading, not only in magnitude but
also in sign. And be aware of the Rift Valley...

Regards from Portugal

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/foss-gps/attachments/20121025/0d63756b/attachment.html>

More information about the FOSS-GPS mailing list