On 09.01.2017 22:56, ksg wrote:
Am 09.01.2017 um 22:15 schrieb Warin <61sundow...@gmail.com>:
On 10-Jan-17 07:56 AM, ksg wrote:
You might use man_made=embankment for them. Don’t use natural=cliff, as these
features are not of natural origin.
The 'natural' key is used for both 'natural' and 'unnatural' objects!
For example 'wood' is used where the trees have been grown from manually
collected seed in an artificial light, automatically provided watering with
liquid food, within a temperature and humidity controlled environment, and then
manually planted out.
Another example is 'water' used in so many man made dammed areas.
In general a cliff is more vertical and taller than an embankment.
The comparison is IMHO misleading because the tree seedlings/growing trees are
still natural organic matter. Water is of natural origin and part of the
hydrological cycle, regardless if it forms a sea, a lake or is stored in a
reservoir.
In contrast the mining faces exist not by geological consent, they are
artificial.
They consist of the remaining geological material, which is of natural
origin.
There is a geological cycle as well, with mountains moving up and down,
continents sink or lift up...
I would not be so picky and allow the new cliff to be called natural,
while I associate other purposes with an embankment.
tom
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