/no makes much more sense for waterbodies than
water=intermittent.
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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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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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since aridity depends as much on evaporation as it does on
precipitation.
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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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be an obvious choice
although it could be useful to make the distinction natural/artificial
waterway indeed mandatory).
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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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of
individual territorial claims (which are obviously limited to the
normal territorial waters).
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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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with it.
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rivers can reduce the salinity quite far out into the
ocean.
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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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boundaries.
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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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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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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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://wiki.openstreetmap.org/wiki/Antarctic_Digital_Database
[2] http://www.eea.europa.eu/publications/COR0-landcover/land_cover.pdf
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/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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://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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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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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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...
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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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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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=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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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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=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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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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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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.
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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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On Friday 06 November 2015, Paul Johnson wrote:
> Stop rendering this key and instead render the relations
Is there *any* map style that does this at the moment?
AFAIK osm2pgsql does not support including relation membership info in
the rendering database.
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h
straints in urban environments.
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ayless area to a solidly built gravel road.
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n this bringing it into a form of a
suitable tagging proposal (see other successful proposals from the past
for some hints) before formally starting the RFC.
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l of them (which is what
natural=salt_flat would imply).
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yes would be right, otherwise
there is no well matching established tagging.
You could of course think about tagging it geological=salt_pan but it
might not be such a good idea to make the dominance of salt the
defining criterion here - the more generic term would be 'dry lake'.
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onor.
Which is why mapping this is not really within the scope of OSM -
natural underground waterflows are inherently non-verifiable.
You can and should map the surface phenomena related to the underground
water flow of course - ponors, dolines, karst springs and other stuff.
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erway=penstock. Generally waterway=* characterizes the water and
its flow while the term 'penstock' identifies a man made
infrastructure. Your tagging suggestion mixes these two separate
concepts into one tag which can be confusing for the mapper.
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uld have no way
to decide how treat such feature. It would just say 'this waterway is
tubed' not what kind of waterway it is (artificial/natural, clean/dirty
water etc.)
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mming pools (for example public
> swimming pools used for swimming lessons)?
Yes.
With indoor facilities it is of course not usually possible to see if
they qualify as water_park without having been there but there are
definitely also many very basic indoor swimming pool facilities that
are tagg
it is rendered in the standard style - might
make sense to also render amenity=public_bath to avoid this.
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p - but keep in mind that the elevation
does not have to be constant.
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ter if they qualify as such or not (which
would be commonly called 'Erlebnisbad').
Since leisure=swimming_pool is rendered in the standard style in blue it
is not widely used for tagging things other than the pool itself.
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to a lot of
influences completely unrelated to the geographic reality. So this
line of argumentation does not really convince.
As i said before - you best think about what you know about the thing
you want to map in terms of verifiable, observable facts. Based on
this you can best decide h
a way - on the contrary you much more
specifically localize it.
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has already been discussed:
https://github.com/gravitystorm/openstreetmap-carto/issues/1957
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variable understanding of what this tag means and its use was
very incoonsistent as a result.
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the Sahara
has been found to be an important source of nutrients for the Amazon
rain forest for example.
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etland types. There is
already some limited use of wetland=string_bog/palsa_bog/raised_bog.
Current tag use indicates severe underuse of wetland=fen and overuse of
wetland=bog. Probably more than half of what is tagged wetland=bog is
actually incorrect.
e climate
would not allow the formation of bogs.
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ry and should be removed (after
moving relevant tags to the area).
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ining all peaks
of these areas.
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s in case of the
Suez Canal).
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3=29.503374=14=3=bing-satellite=mapnik=google-satellite
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t to storm flooding are not outside the coastline.
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85
while the British ones are separate level 2 entities
http://www.openstreetmap.org/relation/1993208
http://www.openstreetmap.org/relation/1983628
Of course the whole matter is politically sensitive, see also:
https://en.wikipedia.org/wiki/United_Nations_list_of_Non-Self-Gov
df
If you do the math you see that the freshwater inflow is insignificant
compared to the tidal water exchange.
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by https://www.openstreetmap.org/changeset/46829336).
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nature.
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around here:
https://www.openstreetmap.org/#map=15/-33.9765/151.0237
at the transit from a meandering river to a ria
(https://en.wikipedia.org/wiki/Ria).
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width=* as it applies.
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waterway=canal/ditch/drain with your
understanding of these terms in your language - and inevitably fail
with that attempt. I just use these tags as defined on the wiki or as
they are used by other mappers and don't concern myself with the
inherent meaning of the value outside OSM.
--
to avoid larger misinterpretation. So
why not.
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urrent use of tags i would
suggest not to recommend not to tag trees=* without community consensus
to abolish this tag.
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nctly want to
use a certain tag (which would be fine) but because they don't know
about the pre-existing more established tag.
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irly unclear about the separation between
landuse=orchard and landuse=farmland. On
https://wiki.openstreetmap.org/wiki/Tag%3Alanduse%3Dorchard
it suggests landuse=plantation for fruit bushes which links to
landuse=plant_nursery which is clearly unsuited for this purpose. This
seriously needs clar
ers if you ask locals about the
name of this feature".
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ere are also
many things that are represented as nodes that should never be
attempted to be mapped as areas - either by convention (like
place=ocean) or due to their nature (like natural=peak).
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because of the widespread paradigm that everything in the world can and
should be represented as points, linestrings or polygons (or nodes,
ways and multipolygons in OSM).
Some further discussion on the matter can be found here by the way:
http://wiki.openstreetmap.org/wiki/Talk:Tag:natural%3Dvalle
ification of the
area this strip is located in can be much less reliable.
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frastructure at the surface.
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claim or oil drilling rights do not seem to qualify since - as
i understand it - you may still do anything in the area you may do
elsewhere (other than drilling of course).
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purposes.
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ing (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.
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ocal
mappers insist it has to have name, name:jp and name:zh all identical)
you can look for a tagging solution to solve these specific residual
problems where required information is lacking in the database.
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_
ined from it) but this is just too good an opportunity, in
particular to ask a former Saint-Petersburg resident:
So the Neva:
https://en.wikipedia.org/wiki/Neva_River
https://www.openstreetmap.org/relation/2811903
should be tagged river=small?
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ly covered by aeroway=runway but doing so will usually
just result in fairly arbitrary application by mappers so using a
subtag (like runway=airstrip) is likely a better approach.
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; as runways that are _on an airport_ (if these exist). Note that it
> says "airport", not "aerodrome".
I am talking about the established use of the tag, not what is written
on the wiki.
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at describes what something
is in an objective and verifiable form. In this case it is "the strip
of land on which aircraft can take off and land". And that mostly
matches current use of aeroway=runway.
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would
still imply there is only one correct way to measure importance and all
maps should base decisions on this measure. In other words: Tagging a
subjective importance tag would mean you try to tell others what they
should consider important.
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s to an external
authority (wikidata) with ultimately incompatible standards.
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nd wikidata (original research regarding the
> physically observable world vs. secondary sources).
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wikidata that OSM constitutes
a "serious and publicly available reference" as per the notability
criteria?
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ally
> means the vast majority of the >500 million tagged features in OSM
> will never be able to get a Wikidata ID and will therefore never be
> able to be connected to other data sets through Wikidata.
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in question. Editors could have functions added to
automatically manage this as well as warning users if they make edits
that do not retain the id (like creating a feature with the same name
as one deleted in the same changeset but without a legacy_id tag).
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uggestion for a better
approach. If you don't want to hear it - your loss.
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essentially
a custom - calling it "established" was meant to indicate that.
You could however argue that this stems from the evidently existing rule
of on-the-ground verifiability.
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you cannot require the mapper to do because it is
non-verifiable information. OSM recruits mappers to map the verifiable
world, we do not require them to also research secondary source
references in wikidata to make sure they correctly maintain wikidata
IDs.
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