[HOT] HOT Activation in response to Floods in Brazil
nicolas.chavent at gmail.com
Fri Jan 14 21:59:05 GMT 2011
Tx 4 following on this:
Always a good thing to have post dis imagery for sure, but always coming a
couple of days/ weeks after occurence of disaster, hard to get and cloudy
weather is not helping. Since it's easier to get pre-disaster data, this is
where the focus should be pre disaster. By reading situation reports on the
ground, it's still possible to locate approximatively main bottlenecks which
will be useful for coordination mapping at small scale (Ex of product are
concept of operations or road conditions maps from the UN LogCluster -
search their website for details).
Glad that you start this work on an imagery layer, key in any contact with
responders is to have a shapefile version of the imagery coverage of AOI.
On Fri, Jan 14, 2011 at 11:32 AM, Jean-Guilhem Cailton <jgc at arkemie.com>wrote:
> For post-disaster imagery, I think the whole AOI is relevant, since we
> have no imagery at all now. (Modis could be available, but 250 m resolution
> doesn't look very useful for mapping).
> A need would be, for example, to map blocked roads.
> (But i hear that it is still raining over the area, so there might be
> For pre-disaster, there are already ways showing coverage, it seems. It
> might just be a matter of creating a relation. (not counting the overly
> cloudy CBERS over Teresopolis - was just better than nothing). Going to work
> on georeferencing another one, hopefully covering Nova Friburgo.
> Le 14/01/2011 17:53, nicolas chavent a écrit :
> Hi there-
> It would be good to consolidate and keep updated a layer showing the
> imagery coverage from which we can highlight the area needing additional
> imagery to direct requests to the imagery providers
> On Fri, Jan 14, 2011 at 3:01 AM, Jean-Guilhem Cailton <jgc at arkemie.com>wrote:
>> I think so, sure.
>> On the jabber Brazilian chat, it was said that the shift is not that
>> large, so it probably doesn't matter. And that in the hills the shift is
>> Probably because of DEM correction, or lack thereof.
>> Maybe Landsat could give you an idea for the local corrections to apply.
>> Le 14/01/2011 09:31, maning sambale a écrit :
>> The hilly areas have very few GPS traces I can calibrate Bing. Given
>>> this is highly rugged terrain I suspect that a single GPS trace would
>>> be of little help. I've seen several inconsistencies with the edited
>>> Should I go ahead, editing using my offset bookmark?
>>> On Fri, Jan 14, 2011 at 9:20 AM, maning sambale
>>> <emmanuel.sambale at gmail.com> wrote:
>>>> On Fri, Jan 14, 2011 at 8:20 AM, Harry Wood<mail at harrywood.co.uk>
>>>> I adjusted bing in Petropolis and here is the offset bookmark in JOSM.
>>>> WGS84 Geographic Bing Sat Petropolis
>>>> 2.6703795206373115E-4 1.0172874364400286E-4
>>>> Can anyone confirm that this OK?
>>>> "Freedom is still the most radical idea of all" -N.Branden
>>>> wiki: http://esambale.wikispaces.com/
>>>> blog: http://epsg4253.wordpress.com/
>> HOT mailing list
>> HOT at openstreetmap.org
> Nicolas Chavent
> Humanitarian OpenStreetMap Team
> Mobile (Haiti): +509 389 583 05
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> Email: nicolas.chavent at gmail.com
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Humanitarian OpenStreetMap Team
Mobile (Haiti): +509 389 583 05
Mobile (France): +33 6 89 45 54 58
Landline (FRA): +33 2 97 26 23 08
Email: nicolas.chavent at gmail.com
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