[Tagging] How to tag small canals?
osm at imagico.de
Sat Aug 18 08:44:51 UTC 2018
On Saturday 18 August 2018, Peter Elderson wrote:
> Sure. But is there a standard method to indicate this uncertainty in
> OSM, which can be processed by data consumers?
This is outside the scope of of OSM IMO and not practical for mappers to
determine in a meaningful way. You can specify the method used to
determine the width (using source:width=*) and different methods will
have different inherent measurement accuracies but the accuracy of the
values depends on lots of other factors beyond that.
Practically mappers have usually no way to verifiably determine the
accuracy of their measurements unless they have a reference value of
known high accuracy in which case the whole excercise is pointless.
Theoretically mappers could practice their measurement skills and
assess their personal measurement accuracy based on test measuring a
statistically significant number of cases under comparable
circumstances with a known accurate reference value but practically
this is not feasible.
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