GPS coordinate problems

Willem Ferguson willemferguson at zoology.up.ac.za
Thu Jan 21 23:17:11 PST 2016


There are problems in the way the the GPS fixes are recorded in 
Subsurface-mobile

Subsurface-Mobile              Companion app
  11:20  -27.5339 32.6842 |  11:20  -27.533912  32.68416
  11:30  -27.5471 32.6696 |  11:34  -27.530935  32.688359
11:44  -27.5312 32.6878 |  11:59 -27.531462  32.68737


Above are coordinates for a specific dive recorded by Subsurface-mobile 
as well as  by the Companion app. The coordinates of the Companion app 
are supported by an independent Garmin GPS. Maybe Dirk is right in that 
there are rounding errors in the mobile application, but this is not the 
most important problem. There are some "rogue" measurements, e.g. the 
11:30 measurement of Subsurface-mobile in the above sequence.
Kind regards,
willem





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