On 27/1/20 12:47 pm, Joseph Eisenberg wrote:
For woods the problem is that there are 3 different levels of fire
impact, and only the most severe is clearly visible in aerial imagery
or from a distance - but this is also quite dangerous to survey in
person.
Many areas and roads are closed due to the hazards. However press reports are
avalible if somewhat breif and tend to show the worst.
) 1A "crown fire" (US English) burns the tallest trees which comprise
the canopy or "crown" of the woodland.
Many of the fires here have been of this type - the word 'unfightable' may be
applied.
In the Northwest USA, this
would be the tall Ponderosa pines, Douglas firs or similar very tall
trees. This sort of fire leaves standing stags with no needles or
leaves and the ground is usually scorched black - very obvious.
2) But most forest fires rarely reach the crown:
Depends on conditions, hot, dry for months and windy ... crown fire is a high
probability.
And that is what we have had.
Many fire fighters have said they have never had fires so numerous and so
ferocious.
{snip}
So if it reasonable to map this? If you do map it, you had best be
prepared to remap the area in 12 months and again after a couple of
years, or the data will be quickly incorrect.
I am not mapping it. Someone from Germany is, some of it from images on
facebook. And I don't think they will be back.
I would also think it is pretty necessary to have the current natural
vegetation mapped at the same time for surrounding areas, or the
extent of the burned area will lack context.
I don't think they are interested in mapping that.
I am inclined to tell them that;
A) the tagging in inappropriate
B) the is no OSM appropriate tagging
c) the data will become out of date fairly quickly
And then ask them to remove their data for the above reasons.
However some may want to map this kind of data. In that case there should be a
tagging system for it.
Is there anyone who wants this data in OSM?
- Joseph Eisenberg
On 1/27/20, Alan Mackie <[email protected]> wrote:
There are some tags documented on the Russian wiki page for key:wood [1]
that describe various types of damage to wooded areas, one of which is
wood:damage=burnt. I don't think it's been used much outside of Russia, but
it seems fairly reasonable for areas likely to regenerate.
There have been other disaster tagging schemes that seem to be used on
occasion, but they always seem to be listed under a particular disaster's
wiki page rather than in some centralised location.
It would be nice to get some more consistency here, but I think the problem
with this sort of tagging is that these tend to be the sort of thing that
should be locally surveyed and updating OSM generally isn't the priority
unless it is somehow part of a specific organisation's workflow.
[1]: https://wiki.openstreetmap.org/wiki/RU:Key:wood
On Sun, 26 Jan 2020 at 22:27, Warin <[email protected]> wrote:
Hi,
I have come across a German mapper who has used 'landuse=brownfield' to
map some recently burnt areas in Australia.
I know this is not appropriate as it is not a land use, nor does it meet
the OSM meaning of 'brownfield' in all situations.
Note: this is done in areas, no matter if it is a farm field, recreation
ground, residential areas etc.
Tagging buildings and other OSM features is easy where they are wholly
burnt using the life cycle tagging.
Should this data be entered in OSM?
Are flooded damaged areas mapped? Earthquake damaged areas?
If entered how should they be tagged?
The keys 'landuse', 'landcover', 'natural' don't look usable to me.
It may not be possible to use a sub key as the burnt areas do not
conform to the presently mapped features.
If mapped then the tagging should be inclusive of other disasters
(natural or not).
Thoughts?
_______________________________________________
Tagging mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/tagging
_______________________________________________
Tagging mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/tagging
_______________________________________________
Tagging mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/tagging
