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Re: [gpsd-dev] [gpsd-users] ✘ Unchanging lat/lon/alt/time error estimat
From: |
Gary E. Miller |
Subject: |
Re: [gpsd-dev] [gpsd-users] ✘ Unchanging lat/lon/alt/time error estimates |
Date: |
Wed, 11 Jan 2017 13:20:09 -0800 |
Yo Hal!
On Wed, 11 Jan 2017 12:34:25 -0800
Hal Murray <address@hidden> wrote:
> From Jeff's message a month ago:
> http://lists.nongnu.org/archive/html/gpsd-users/2016-10/msg00010.html
>
> > I'm now setting up a new RPi 3 to replace it. I installed gpsd
> > version 3.16, built from source. Same GPS unit (Adafruit Ultimate
> > GPS module). My application uses libgps, and everything seems to
> > work fine except that the values in gps_data->fix.epx and
> > gps_data->fix.epy never change. I use those values to display an
> > accuracy ellipse on a map, which is important for my application.
>
> How come the test stuff didn't catch that?
Because some people just rebuilt the regressions after a bad change and
do not go back and eyeball the changed results for correctness.
Also,,, most of the regressions are short snippets and to see this
problem you need maybe a few minutes of data with a changing skyview.
If you care a quick look in the git log will show who to blame. I'm sure
you can find where I have made that mistake too.
RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
address@hidden Tel:+1 541 382 8588
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"If you can’t measure it, you can’t improve it." - Lord Kelvin
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