Hi Michael,
It would greatly help us if people who have trekked in these areas send us gps
traces. These long paths woud be useful, plus village names.
I sent a twitter yesterday to sollicit receiving these gps traces. People
should write to activation @
hotosm.orghttps://twitter.com/pierzen/status/594786000729186304
Pierre
De : Michael Krämer <[email protected]>
À : "[email protected]" <[email protected]>
Envoyé le : Lundi 4 mai 2015 2h56
Objet : Re: [HOT] data alignment to satellite imagery
Hi,
for me the "gold standard" for image alignment in OSM are gpx traces with high
quality. If no traces are available - which likely applies to most of Nepal -
Bing is the standard to use. In either case adjust any other imagery to match
the alignment of the standard.
But now the limitation: Some of the imagery currently in use with HOT shows
some difference compared to Bing. But this is not a simple shift. To my limited
understanding this comes from the correction applied to the image. Especially
in mountains this is difficult - which likely is especially true for the
Himalayas. But keep the distances in mind: With high resolution images a shift
of let's say 10 m is pretty visible - but should not really matter too much in
real live.
In any case: Try to align any of your work with Bing. Leave any misaligned data
for now.
Michael (user Ohr)
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