Hi,
As it might be useful to have a agreement on common offset values for
this imagery, we could try to crowd-source their computation, by
averaging "contributed offset estimates".
I'll dive in and submit some values (from JOSM, in Mercator projection,
epsg:3857) :
- for Montevista : -87.1; 24.2
- for New Bataan : -40.7; 14.4
- for Cateel : 52.2; 13.2
- for Baganga : -61.9; 44.9
(Looking mostly at the town centers, with existing OSM data and GPS
tracks where available. These are themselves averaged over 3
""independent"" estimates).
So what are your offset estimates ?
Best wishes,
Jean-Guilhem
Le 28/12/2012 16:48, maning sambale a écrit :
Dear Severin,
I noticed that too at Baganga. Based on Sertit's page [0], horizontal
geometric reference is "Pleiades Navigation Parameters".
I don't know what it actually means but I suspect there were no
orthorectification done for the imagery. There are uploaded traces in
which you can use to adjust the imagery.
[0]
http://sertit.u-strasbg.fr/SITE_RMS/2012/09_rms_Philippines_2012/mid/SERTIT_Charter424_P02_Philippines_Baganga_North_Damage_5k_midres.jpg
On Fri, Dec 28, 2012 at 11:29 PM, Severin MENARD
<[email protected]> wrote:
Hi Maning,
What about the georeferencing for this new imagery? Eg Baganga has an offset
comparing to Bing and the current vector data.
Sincerely,
Severin
------------------------------
Message: 2
Date: Fri, 28 Dec 2012 19:17:19 +0800
From: maning sambale<[email protected]>
To: osm-ph<[email protected]>, HOT<[email protected]>
Subject: [HOT] post-typhoon pablo/bopha imagery from atrium/unosat
Message-ID:
<CAPzumuFuPnOncq=eegsstqrgrpwog7wvgt+zwkjstwezx5t...@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Dear everyone,
Post-disaster imagery in selected areas in Mindanao affected by
Typhoon Pablo/Bopha is now available for tracing in OSM. This imagery
is currently available through JOSM and you need to agree with the
Astrium/UNOSAT license to access them. Full details on how to use the
imagery is available in the individual tasks below:
- Montevista - http://tasks.hotosm.org/job/130
- New Bataan - http://tasks.hotosm.org/job/131
- Cateel - http://tasks.hotosm.org/job/132
- Baganga - http://tasks.hotosm.org/job/133
If there are problems with accessing the imagery, just ask here. Thanks!
--
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
------------------------------------------------------
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End of HOT Digest, Vol 34, Issue 39
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