[Tagging] Tagging Digest, Vol 63, Issue 72

Ulrich Lamm ulamm.brem at t-online.de
Wed Dec 24 13:03:37 UTC 2014

Some weeks ago, I have written something on reliable mapping, see https://wiki.openstreetmap.org/wiki/User:Ulamm/Mappers,_evaluators_and_feedback

For a special feature, I'd also added it to an existing article, but it was reverted, see "Attention" in the upper table of https://wiki.openstreetmap.org/w/index.php?title=Tag:bicycle%3Duse_sidepath&oldid=1119074


Am 24.12.2014 um 01:29 schrieb tagging-request at openstreetmap.org:

> Date: Tue, 23 Dec 2014 17:37:34 +0100
> From: Rainer F├╝genstein <rfu at oudeis.org>
> To: "Tag discussion, strategy and related tools"
> 	<tagging at openstreetmap.org>
> Subject: [Tagging] Accuracy of survey
> Message-ID: <811143140.20141223173734 at oudeis.org>
> Content-Type: text/plain; charset=ISO-8859-1
> while we are at it, imagine the following situation:
> mapper A, by means of DGPS, MilStd GPS, crystal ball etc., is able to
> achieve an accuracy of, say, a few centimeters and uses it to add new
> nodes (POIs) to OSM.
> some time later, mapper B with his/her ancestors mechanical GPS device
> (*), achieving an accuracy of max., say, 15 meters, surveys the same
> area, figures out that (by his/her point of view) POIs added by mapper
> A are 15 meters off and corrects their location. 
> what is needed here is some tag, saying "don't touch these
> coordinates, they've been surveyed with high(est) accuracy".
> I heard this argument from an pipeline expert, noting that marker
> surveyed with consumer GPS are (for their standards) way off their
> real location.
> maybe this is a non-issue after all, if consensus is that consumer
> GPS accuracy is sufficient enough.
> cu

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