<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Dec 1, 2020 at 11:18 AM Warin <<a href="mailto:61sundowner@gmail.com">61sundowner@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div><p>The 'Auto' setting may not be 'optimal' for what you want, but as
a compromise between data bloat and resolution/accuracy it maybe
better than a fixed time as judged by the developer/manufacture. <br></p></div></blockquote><div>For not 'optimal' I mean that with the same number of points you can approximate better the same curve.</div><div><br></div><div>Just found this gpxsimplify tool (<a href="https://github.com/tkrajina/gpx-cmd-tools">https://github.com/tkrajina/gpx-cmd-tools</a>) that can reduce the number of points of a recording done with "1Sec" to the same number of points of the "Auto" settings allowing only a maximum error of 30cm.<br></div><div><br></div><div>It uses the Ramer–Douglas–Peucker algorithm</div><div><a href="https://en.wikipedia.org/wiki/Ramer%E2%80%93Douglas%E2%80%93Peucker_algorithm">https://en.wikipedia.org/wiki/Ramer%E2%80%93Douglas%E2%80%93Peucker_algorithm</a></div><div> </div></div></div>