Re: [Tagging] Handle with care (was: Accuracy of survey)

[André Pirard]

On 2014-12-29 15:27, Kotya Karapetyan wrote : Happy holidays and 2015 everyone! > what is needed here is some tag, saying "don't touch these > coordinates, they've been surveyed with high(est) accuracy". I second this idea. Just recently I discovered that something in this direction already exists: https://wiki.openstreetmap.org/wiki/WikiProject_France/Rep%C3%A8res_G%C3%A9od%C3%A9siques#Permanence_des_rep.C3.A8res Example: https://www.openstreetmap.org/edit#map=23/43.42272/6.76665 However it seems to be France-specific. I don't know if a similar thing exists e.g. for Germany. Since such reference points are quite common, I would support the idea of creating a special tag for them, requiring that they are not moved. However we need a clear consensus on how we define the "sufficient" accuracy and how the data for such points will be updated. These are very good ideas but restricted to a very particular case. There are various reasons for warning other mappers to be careful about their updates. I once temporarily overlaid two walking routes to show the effect of displaying two sorts of icons. Or I left in for a while drawing errors of a plugin as the best way to show the author what I talk about. Despite a don't touch note explaining why, a good soul passes, not reading note and makes a "correction". What is needed here is an "are you sure" tag named [keyname:]warning=* or [keyname:caution]=* that the editor uses any time a mapper wants to change that key's value (not uploads a dozen updates)  to display the message and ask for a confirmation. Or should it be [keyname:]note:warn=* and spare another wiki page? keyname can be "geometry" as in source:geometry. Et voilà.  An all-purpose simple guardrail, a small update to the wiki and passing the word to the editors. What do you think? Cheers André.

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