On 10-Jan-17 12:00 AM, Tom Pfeifer wrote:
On 09.01.2017 13:15, ael wrote:
This thread has reminded me that I have encountered problems with
mapping disused quarries and surface mining.
The quarries that I have in mind are major geographical features - they
have not been filled in. I tried tagging them as landuse=quarry and
disused=yes. If landuse really does mean current use of an area, that
looks contradictory. Often such old quarries are now in use for
We have lifecycle tagging for this purpose. Your former quarry is
disused:landuse=quarry
Please do not use "disused=yes" as it is considered troll-tagging,
first saying it is simething, and in the next line negating it.
Often such old quarries are now in use for recreation, often the
water filled part for watersports. So perhaps that
is "land"use=recreation or landuse=quarry;recreation? It seem clear that
there is a problem here. A (large) quarry is perhaps geographical rather
than landuse?
The landuse tag should describe the current use, not the former. Thus
it is
landuse=recreation_ground or
natural=water (as it has been re-naturated into a lake)
Err I think it is both
landuse=recreation_ground on the whole area (land + water) that is used
for recreation
And
natural=water on the interior bit that has water.
In the end is is just mankind changing landscape, as other geological
processes do; such as the glacier in the ice age carved out a valley.
I have the same problem with historic surface mining areas: these are
major features on the landscape, often with very large excavations,
and need
recording/rendering, yet now are "just" moorland or have other uses.
Rendering depends on your interest. You can render a map with disused
features. You can convince the carto team to do so on the major map if
you prove sufficient general interest.
Again, I didn't think landuse=surface_mining + historic + disused worked
and certainly didn't render.
I am tempted to bring up the case of major bridges which are parts of
abandoned railways not being rendered. While that really is a bug in the
man_made=bridge is rendered on the main carto map. If the bridge
outline of a major bridge is not in the database, it's the mappers'
fault, not the renderers'.
renderers, if we had some tag for major physical features that would
be rendered regardless of any historic or disused tags. it would solve
many such problems.
Any suggestions: do we need new tags?
No.
https://wiki.openstreetmap.org/wiki/Key:disused:
Usage:
disused:landuse=* 616 of which quarry are the most frequent with 227,
followed by 101 military.
https://taginfo.openstreetmap.org/keys/?key=disused%3Alanduse
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