Dear all,
I'm just starting to map roads etc. for this job with the SPOT-6 imagery
in NIR. The already existing major roads have a significant offset to
the satellite image (e.g. major road from Macenta to Voinjama). Should
the offset be corrected or is the geometric correction of the SPOT
images not sufficient?
thanks,
Michael
Am 04.04.2014 15:26, schrieb Jean-Guilhem Cailton:
Hi,
Airbus Defence and Space, Geo-Intelligence has donated Spot-6 images,
acquired between 2013-10-13 and 2013-12-11, that cover a large part of
the area of the border between Northern Liberia and Southern Guinea,
including the towns of Voinjama and Kolahun in Liberia, as well as the
cities of Guéckédou and Macenta in Guinée, and their surroundings.
Job 489 has been set up on the Tasking Manager:
http://tasks.hotosm.org/job/489
For the cities of Guéckédou and Macenta, where higher resolution
Pleiades images are available and that were already mapped (jobs 469 and
471), it is better to keep using the Pleiades images as geometrical
reference, as they have better accuracy (6.5 m CE 90 without GCPs).
Use source=Spot-6, Airbus
Best wishes,
Jean-Guilhem
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