[Tagging] How to tag for dualband GPS ?

[Warin]

On 1/12/20 9:36 pm, Colin Smale wrote:
>
> On 2020-12-01 11:14, Warin wrote:
>
>> The differences are less than 10m. (The points of the green track are 
>> where data exists, the straight lines between those points simply 
>> connect the measured points. )
>>
>> The 'simplify way' in JOSM is normal set for a maximum difference of 
>> 3m as a way of reducing data bloat while sacrificing some accuracy.
>>
> What accuracy is optimal for OSM? Why should we sacrifice any accuracy 
> at all? Who chose 3m as a tolerance figure? That sounds rather high to 
> me - it's the width of a small road, or half a house. If we are going 
> to draw a line at all, I would go for something <= 1m.
>

In some instances the 3m distorted the feature I was dealing with. When 
I set it to 1.5m the result was a good represeentation of the feature. 
So I deal with the resulting representation of the feature.


--------------------

I note that some roads in OSM are straight lines between towns .. while 
in the real world they are far from straight. This has to deal with the 
road exists but mappers have limited time to enter data. Only in places 
where local mappers have mapped most things that the details are mapped 
better are 'accuracies' of some discussion.

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