[Tagging] Landfills timespan

Jez Nicholson jez.nicholson at gmail.com
Thu Feb 20 10:32:05 UTC 2020


Mapping of things that cannot be verified on-the-ground has to be a very
special case. Such as underground power cables.

A currently active landfill and a completed/capped-off landfill are not the
same thing. One is verifiable on-the-ground, the other is not. One has a
[surface] landuse of being a waste dump, the other has been returned to
another landuse such as building or using as a park. Sure, under the
surface there is some waste, but I don't believe the purpose of OSM is to
map the subsurface.

Ex-landfills are notoriously difficult to spot and, in the UK at least,
people just didn't keep records because "out of sight, out of mind".
Geodata for ex-landfills is much prized in the property environmental risk
industry.

On Thu, Feb 20, 2020 at 10:05 AM Martin Koppenhoefer <dieterdreist at gmail.com>
wrote:

> Am Do., 20. Feb. 2020 um 10:54 Uhr schrieb Cascafico Giovanni <
> cascafico at gmail.com>:
>
>> Hello,
>>
>> I've an OSM compatible dataset that helps me to spot landfills. Older
>> ones are already covered by grass and/or trees.
>>
>> IMHO could be useful to save landfill locations for a future possible use.
>> Does it make sense tag the ones with surface alterations with level=-1 ?
>>
>>
>
> IMHO, landuse is not stacked, at least not in a case like this (there may
> be some exceptional situations, eventually). The fact that the landfill is
> overgrown still makes it a landfill, and all the toxic stuff is still
> there, just covered by a thin layer of soil and vegetation.
>
>
>
> Or shall I consider landuse=landfill as a functional tagging, hence
>> tagging them abandoned:landuse=landfill?
>
>
>
> that's a good question. Landuse is not completely consistent. There are a
> few landuses like quarry, landfill and even "harbour" which do not
> integrate well with the other landuses because these mentioned are
> typically used _also_ for features (i.e. if you split a landuse=quarry, you
> will have 2 quarries, opposed to e.g. landuse=residential, which simply
> says this area is used as residential area, and if you split it, the
> meaning remains the same, i.e. it is a property about the use of land).
>
> A possible solution would be the introduction of feature tags for these
> outliers, e.g. man_made=quarry, man_made=landfill / waste_dump, seaway=port
> / cargo_port / fishing_port etc.
>
> Cheers
> Martin
>
>
>
>
>
>
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