[Tagging] landuse=industrial with industrial=port

Martin Koppenhoefer dieterdreist at gmail.com
Thu Feb 23 16:42:43 UTC 2017

2017-02-23 14:38 GMT+01:00 Stefano <sabas88 at gmail.com>:

> Hello,
> I just tried and Marinetraffic (probably the only -or one of the few-
> consumer in the field) seems to handle only industrial=port in their custom
> maps.
> Does a totally new key have benefits?

I believe there are some benefits, not the least systematics and
findability. Something as important, frequent and big as a port should have
a prominent tag, like similar features. Nobody would ever come to the idea
to look in the subkeys of a landuse for such a feature (unless you use the
wiki search maybe).

Landuse is not suitable for several reasons (I don't say we can't have a
landuse subtype for industrial ports, it simply shouldn't be the only way
to map a port, it's rather a way to specify the kind of industrial landuse):
- landuses require a polygon in order to map them
- landuses are not necessarily features, they are rather a property of land
(about the current usage), which can have features on it, e.g. houses. See
them like surface=paved.
- there can be several landuse polygons for one port, also with different
values potentially.

Clearly, there isn't any comprehensive scheme now to map a port, most of
marine related features are in the specialist field of the seamark
namespace, which really is not integrated well, it's more like a parallel
universe within OSM, until lately they even had a parallel scheme for many
things for which there were already established tags in OSM, like a
restaurant or a shop, and I also believe although I am not sure, that their
main concern is water navigation for leisure, hence the missing industrial
ports (but there is for leisure=marina).

At this point, looking at other key namespaces for transportation in OSM, I
think seaway is a logical extension to the whole scheme. Railways have
their stations, aeroways their aerodromes and highways their bus stops and
service areas. We might even think of migrating those tags from the seamark
namespace that deal with marine related stuff that isn't actually a
"seamark" in any way, i.e. infrastructure related to the navigation at sea,
if people want to do it, obviously.

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