[Tagging] Using multipolygons to map bays in Alaska

Daniel Koć daniel at xn--ko-wla.pl
Sat Nov 17 01:52:28 UTC 2018


W dniu 17.11.2018 o 02:00, Christoph Hormann pisze:
> On Saturday 17 November 2018, Daniel Koc4� wrote:
>> The problem is that I have asked you how to draw verifiable node,
>> [...] 
> No, you have not, you have asked:
>
>> It would be much more useful if you tell now how to verify position
>> of this node?
> And i told you exactly that.


I have told you exactly how to verify the shape of a strait/bay area
just by using even simpler operation (connecting the dots). So the area
is verifiable now, just because the operation is also fully verifiable -
isn't it?

Everything starts with assuming we know the borders of this area, which
is the source of all verifiability problems - not the operations.


> (which by the way is against the goals of OSM-Carto even if your 
> opinion on this has merit).  


I don't see any support for your opinion about it, there's nothing about
rendering polygons being bad (or good) in the goals you wrote.


> You can try to justify that all you want - 
> this does not change anything about the argument i gave against it - 
> that the polygon drawing almost never adds any verifiable information 
> on the geographic reality compared to a node or a linear way 
> representation.


You did not answer basic question, which helps to show how verifiable is
a node in the middle of some area: how do you measure a precise middle
of the completely unknown shape?

(If you don't have some other, hidden assumptions, which would be a
problem in itself.)


> I can just hope most mappers will emancipate themselves from 
> this and not invest their time and energy in mapping and maintining 
> polygon mazes over coastal waters.

When I edit any big city I find a lot of way and polygon mazes (a lot of
crossing lines). Maintaining them is a real problem I face from time to
time, yet nobody has proposed to remove them and use nodes instead.

Water areas will never be that bad in this respect, they are much simpler.


-- 
"Excuse me, I have some growing up to do" [P. Gabriel]





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