<div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">2014-12-24 0:21 GMT+01:00 Friedrich Volkmann <span dir="ltr"><<a href="mailto:bsd@volki.at" target="_blank">bsd@volki.at</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div id=":4z9" class="" style="overflow:hidden">I used estimated_accuracy=* or gps_accuracy=* a couple of times, but I doubt<br>
that it prevents other mappers from moving or even deleting them. Some use<br>
editors like Potlatch, so they are not aware of tags. Some do thousands of<br>
edits, all of which are validator based "corrections". They do not ask nor<br>
think nor look at tags, except at those reported by the validator.<div class=""><div id=":4yh" class="" tabindex="0"></div></div></div></blockquote></div><br><br><br clear="all"><br></div><div class="gmail_extra">the effects of those "semi-mass-edits" or other careless following edits must not be feared too much: as long as the original tag is preserved (otherwise it will unlikely be noticed unless it is searched for) other mappers might take a look and see from the history to which coordinates the note belongs. I think notes are a good way of passing particular information about the survey conditions to other mappers. <br><br></div><div class="gmail_extra">Positional accuracy should not be overestimated, in dense areas it is more important to have good relative positioning (things should relate in the map like they do in the real world, e.g. with regard to "left or right side of the road", crossing in the same point or 2 adjacent crossings, angles, line of sight, size relations, parallel vs. not, etc. In these settings you typically won't find a GPS of much use when mapping today in a well mapped urban area. In lower density areas (e.g. countryside, mountain areas) it usually doesn't matter to have cm-precision, 10-15m are more than sufficient, bare some potentially very rare counter examples. <br><br>Still I can understand that when you use equipment with significant higher or lower precision than average you'd want to have a dedicated tag to formalize entering the presumed precision in a machine readable way. just do it ;-)<br><br></div><div class="gmail_extra">Cheers,<br>Martin<br>
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