as tagging for the end-users because GIS people and pilots
were looking for leisure=common for unofficial landing sites in some
places such as West Africa.
And that by the way is the very definition of cargo cult
(http://en.wikipedia.org/wiki/Cargo_cult_science)
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to
indicate a way waterway=river is required to be mapped within the
waterway=riverbank polygon but not that its location must be exact. I
clarified this in the wiki.
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in some
way (either through manual mapping, computing the missing data or
getting it from other sources). Otherwise the data becomes dead mass
in the OSM database.
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=wadi - despite the then
misleading key - for valleys where waterflow is unknown.
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, seasonal=no
although i don't think past imports of NHD data have made this
distinction.
waterway=wadi can mean either intermittent or ephemeral or permanently
dry, see also
https://wiki.openstreetmap.org/wiki/Talk:Tag:waterway%3Dwadi
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criterion for importance and it is very widely available already (35551
nodes aeroway=aerodrome with 31752 ways aeroway=runway). The problem
here is not having this information mapped i think but querying it from
the rendering database.
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analyzing
30k-40k airports would not be such a big deal. But doing this again for
every zoom level and repeatedly near the metatile boundaries would hurt
of course.
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=bed_and_breakfast 154 times.
Generally given the huge influence the standard style has on mapping and
that a lot of people articulated the need to differenciate between BB
and larger guest houses in discussions i agree this change indeed is
probably not to the better.
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consider the inner bay a lagoon rather than
a bay.
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get it right.
The wiki defines bays as Area of water mostly surrounded by land.
There are quite a few cases tagged this way with only a slight dent in
an otherwise flat coastline where - if you'd map them as an area - less
than half of the area outline would be formed by coastline.
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the text along them.
The main problem is that spatial database systems are not well suited
for this kind of work (i.e. tasks like 'find the closest coastline in a
certain direction').
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coastline ways would belong to more relations, so what ? They
already usually belong to 3-4 administrative boundary relations,
Yes - and boundary relations are well known to be constantly broken and
a pain to maintain even for experienced mappers.
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other area-like obbjects in osm).
You mean like place=town, place=city etc?
SCNR.
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somewhat
further, is a bay and is named ...
This is a much more accurate description of reality than a polygon.
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to formulate a formal mathematical rule for where the node
for a bay is best placed: Place it so the variance of the distance of
the node to the bay's shores is minimized. Most existing nodes comply
with this rule remarkably well.
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by the way was already made in a slightly different
context in
https://github.com/gravitystorm/openstreetmap-carto/issues/804
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in such situation you
would end up having to deal with a handful of convoluted multipolygon
relations, some of them of colossal size. Properly editing coastlines
is difficult for beginners in the first place. This would make it
borderline impossible.
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://www.openstreetmap.org/node/2001818936
has an east-west orientation when you look at it closely but on a coarse
scale it is a north-south crossing.
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https
/File:Port_du_Marcadau_-_versant_espagnol.jpg
http://commons.wikimedia.org/wiki/File:Etang_de_caraussan_aerien.JPG
http://commons.wikimedia.org/wiki/File:Grand_Cambal%C3%A8s.jpg
does not qualify as natural=bare_rock in total even if locally there is
exposed bedrock of course.
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://wiki.openstreetmap.org/wiki/Antarctic_Digital_Database
[2] http://www.eea.europa.eu/publications/COR0-landcover/land_cover.pdf
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to a different distribution of POIs and things fall apart quickly.
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do not fall into
this trap with your peak=* concept.
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but doing this in the
general case is very expensive so it would make sense to record this
information in the database.
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have a large multipolygon with like a hundred ways in it you want to
cut in two for example this is quite cumbersome and error prone at the
moment.
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boundaries.
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baseline.
Under the proposed rules an argument could be made for placing the
coastline near Montevideo. Buenos Aires could well be considered to be
located at the river rather than the coast although the transit could
also be placed further upstream of course.
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with it.
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rivers can reduce the salinity quite far out into the
ocean.
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centerline first (assuming it exists).
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tagging is that there ia no clear
criterion to distinguish between lakes and rivers/riverbanks. The new
tagging scheme acknowledges this and makes the distinction optional.
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of
individual territorial claims (which are obviously limited to the
normal territorial waters).
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an idea for a practically measurable quantity that has a
clear relation to the discharge of a river that would be useful to tag
of course.
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be an obvious choice
although it could be useful to make the distinction natural/artificial
waterway indeed mandatory).
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).
And even if you'd change the definition of river/stream to represent
importance this could never be locally verifiable and globally
consistent at the same time.
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since aridity depends as much on evaporation as it does on
precipitation.
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is a typical bit of low
elevation vegetation in the same area:
http://www.californiachaparral.com/images/555_PS-A-White-Ceanothus.jp
g
This already goes in direction of scrub - in fact the distinction
between scrub and heath is not well defined.
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be classified as montane grassland and shrubland:
http://en.wikipedia.org/wiki/Montane_grassland_and_shrubland
This is however a very broad and anything but clearly defined
classification so hardly suited for tagging.
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not specify what grows there but
instead says why it grows there (because it's beyond the alpine/arctic
treeline). In this way it would be similar to natural=wetland (or the
infamous natural=desert).
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/no makes much more sense for waterbodies than
water=intermittent.
Greetings,
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