It takes a few steps but it seems to work.
USE AT YOUR OWN RISK. Check all waypoints and settings in Litchi to make sure your points and altitudes are correct. Note that the DEM elevation data is not exact and could cause you to misjudge ground elevations.
Here is a link to the spreadsheet that has instructions and does most of the work. I use Open Office Spreadsheet and that is the format it is in:
http://logdovetailjig.com\utility.ods
Here is a version I saved in Excel format. I have not tested this version since I don't have excell
http://logdovetailjig.com/utility.xls
Thanks to Adam Schneider at GPSVisualizer for his help and conversion tools.
See screenshots below.
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