[Tagging] Barrier=berm

Graeme Fitzpatrick graemefitz1 at gmail.com
Thu Nov 28 23:21:17 UTC 2019


On Thu, 28 Nov 2019 at 20:47, Volker Schmidt <voschix at gmail.com> wrote:

>
>
>    - First of all when I see a both-sided sloped linear elevation I do
>    not know I see a berm.because it is a rarely used term
>
> Can you see a pile of dirt? If so, it's a berm. If it's a bricks, blocks,
rocks, concrete, wooden, steel or any other type of construction, it's not!
I agree it's not very common in normal usage, but would be quite common in
any engineering context, & there are any number of OSM terms which are very
specialised!

>
>    - Second it is ill-defined from the shape point of view: it can define
>    a step in an earth wall and it can mean an earth wall with sloped sides
>
> Yep, either one could be a berm.

>
>    - Fourth it can describe man-made or natural objects.
>
> I saw reference to berm also being used to describe a line of debris
thrown up on a beach by a storm, however, that wouldn't be a permanent
feature, as it would be changed by the next storm, or human use of the
beach, so we wouldn't map it.

Let's go back and define what we need
>

Agree with everything you say here


>
>    -  (this tag is purpose-free)
>
> Sorry, I don't understand what you mean by "purpose-free"?

Thinking about it we may only need to add a new man_made=slope_base tag.
> Packaging this together with the opposite man_made=embankment in a "slope"
> relation, this would give us the possibility to model even complex objects.
> Without a relation a closed  man-made=slope_base way could be used to draw
> the footprint of levees/dykes. The use could be similar to water=riverbank.
>

I did suggest area=slope or similar, to map the area of levee walls in
discussion about large flood control levees a couple of weeks ago, but it
didn't seem to go down very well?

Thanks

Graeme
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