My present though is that this is trying to convey at what zoom levels
these features should appear.
These 'importance' tags are starting to appear for all different kinds
of things - aerodromes being one.
So why not introduce a property tag (like width, height, capacity,
pressure) such as 'prominence' that can be use for any feature?
And, yes, 'prominence' is subjective. If the scale has few values then
that will reduce edge cases and there will be few arguments over which
side a feature resides.
(Yes I can hear the 'tagging for the render' cry from here already.
However this looks to be usefull information that mappers want to tag.
So give them a way of doing it and let the mappers and renders chose to
use it or not.)
On 17-Oct-17 01:46 AM, José G Moya Y. wrote:
What I try to say is that the original proposal tagged rivers
according to their relative importance in a country.
What's the criterium to know if a river is "major" inside a country?
Is it its occurrence in the school curriculum?
Iregua, which is a very small river (5 m width on its end) was in the
"Spanish river list" I had to learn in the school. I learned about
Garonne in highschool, when we reached the "European rivers" standard.
But I only knew it crossed Spain when, at the age of 30, I visited a
remote village and found a river named "Garona" that flew to France.
(Here in Spain, education is very chauvinistic: I passed all my degree
in literature without hearing a word about Shakespeare, Molière or
Goethe. Latin-american authors, despite of writing our same language,
are being removed from the curriculum).
El 16/10/2017 16:06, "Christoph Hormann" <o...@imagico.de
<mailto:o...@imagico.de>> escribió:
On Monday 16 October 2017, José G Moya Y. wrote:
> Ilya,
> As some people said, river "size" is ambiguous. If you're talking
> about relative size of a river in term of rivers of the same
country,
> Ebro and Tajo are "major" rivers in Spain. If you're talking about
> absolute size (compared with rivers in the world), Ebro and Tajo are
> small rivers. On the same hand, Garonne starts as a "minor" river in
> Spain and ends as a "major" river of France and Europe.
For better understanding: What the proposal tries to specify is an
importance rating for rivers based on their name, i.e. the Garonne
would by definition have the same rating everywhere it is named
Garonne. If the upper part of a river is named differently than the
lower part it would be a different river - hence potentially a
different importance rating (like Nile - Blue Nile/White Nile or
Rhein - Vorderrhein/Hinterrhein).
This has very little to do with the size of a river as a local
property
(like the width or the discharge) which a mapper would normally use as
a basis for tagging the size of a river.
--
Christoph Hormann
http://www.imagico.de/
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