Re: gpsprof: higher resolution

[John Ackermann N8UR]

Thanks for the info, Gary.  The problem isn't the processing or display 
precision, it's (I think) that the autoscaling is failing to act 
reasonably when the range is very small.  As you note, the result might 
not actually be "wrong" given the few pixels that 9 places of precision 
may span, but it doesn't look so good. :-)

The version I'm using for this particular task is whatever is 
distributed with Linux Mint -- I know it's old, but I don't normally use 
this machine for GPS tasks so never did a local build.  If the newer 
version is likely to behave differently, I can certainly arrange to use it.

John
----

On 8/16/20 5:39 PM, Gary E. Miller wrote:
> Yo John!
>
> BTW, what version of gpsprof are you suing?  That looks pretty old?
>
> On Sun, 16 Aug 2020 10:16:15 -0400
> John Ackermann N8UR <jra@febo.com> wrote:
>
> > But the gpsprof plot isn't very useful; see attached. I'm guessing
> > that I'm running up against some limit that prevents getting a proper
> > scale for the very small values.
>
> Odd as it seems, looks right to me.  Using %.9f lat/lon, and your data is
> only +/- a few mm, that is only a few dots high.
>
> gnuplot makes the simple trivial, and the slightly more difficult a real
> PITA.
>
> The way to play with this is to hand edit the acii plot file until you
> get what you want.  Then figure out how to modify the code, or jsut send
> what works to me and I can do that.
>
> Notice on line 600, that autoscale is set:
>          fmt += ('set autoscale\n'
>
> Sometimes that is easy to change, usually it becomes a large mess.
>
> Maybe try:
>          set autoscale x
>          set yrange YYY
>
> You can easily lose a few days down that rabbit hole.
>
> RGDS
> GARY
> ---------------------------------------------------------------------------
> Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
>         gem@rellim.com  Tel:+1 541 382 8588
>
>             Veritas liberabit vos. -- Quid est veritas?
>      "If you can't measure it, you can't improve it." - Lord Kelvin