[HOT] Mali follow-up: OrbView-3 image of Mopti available

Frédéric Bonifas fredericbonifas at gmail.com
Sat Apr 7 23:44:50 BST 2012

Thanks Jean-Guilhem,

I started tracing with this imagery but comparing with the GPS tracks,
it seems like the imagery is shifted by about 20 meters to the east.
Is it possible to easily correct this offset, or do I have to do it
manually in JOSM ?


2012/4/7 Jean-Guilhem Cailton <jgc at arkemie.com>:
> Hi,
> An OrbView-3 image (1 m resolution, panchromatic) of Mopti, Mali, is
> available as TMS at this URL for JOSM:
> tms:http://osm.arkemie.org/cgi-bin/tiles/1.0.0/mali/{zoom}/{x}/{y}
> (Use http://osm.arkemie.org/cgi-bin/tiles/1.0.0/mali/$z/$x/$y in Potlatch 2
> syntax)
> It is from 2005-03-31, so you can use "source=OrbView-3, USGS, 2005-03-31"
> It was processed at level L1Gst by USGS. The usual warning about checking
> the offset with GPS tracks applies. (Some are available for Mopti.)
> The same URL also contains another image, west of the city of Kidal. It
> could be used to improve the tracing of a "highway=road" imported from
> vmap0.
> Best wishes,
> Jean-Guilhem
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Frédéric Bonifas
+33672652807 skype:fredericbonifas

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