[Tagging] Large fire perimeter tagging?

Rob Savoye rob.savoye at hotosm.org
Thu Sep 24 22:26:54 UTC 2020

On 9/24/20 4:07 PM, stevea wrote:
> On Sep 24, 2020, at 2:53 PM, Joseph Eisenberg <joseph.eisenberg at gmail.com> wrote:
>> Most large wildfires do not burn the canopy (the tallest trees) in forests with trees over 10 meters in height.

  I'd disagree, and I'm probably the only one on this list who works
active wildland fires. We call these "crown fires", and the fire jumps
from tree top to tree top. The fire I was recently deployed to burned
*everything*, and I have pictures...

>> The perimeter of the wildfire, shown commonly on public maps, does not determine which areas have been burned. Often there are large areas of vegetation along canyon bottoms and streambeds which are unburned, within the perimeter.
> Something I already DID know, also noted, thank you.

  Yes, the "burned area" is patchy. Lots of green parts, as well as spot
fires far from the main perimeter.

>> Database users who need these perimeters should download the latest version from the official sources. 
> Yes, AND OSM users who map in areas affected by the fire want (likely need) fire perimeter data to delineate where substantial "re-mapping" almost certainly must take place.

  You can get the official real-time data for fire perimeters in the US
from here:

  I have to add these manually and generate my own PBF file for OsmAnd,
but it works. I do agree the perimeter is probably not worth uploading
to OSM, so I don't worry about the tagging.

	- rob -
Senior Tech Lead
Humanitarian OpenStreetMap Team

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