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It not a specific OSM question, but I ve noticed a strange kind of drone, flying low to make views for OSM ? Could someone explain it ? Its only visible in Bing. http://www.openstreetmap.org/#map=17/26.62359/-111.81148 |
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These artifacts occur because aerial images are taken by multiple cameras, and the cameras may not all capture their images at exactly the same time. During even a tiny delay, fast-moving objects like aircraft may change position. When the images are combined later this creates effects like ghosts, shadows, or rainbows. See the Google Earth Blog for more explanation and examples. |
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Possibly it is just a commercial aircraft flying in the field of view covered by the camera on the Bing survey satellite. Handily, there's a truck on the road just to the east for scale - it looks like a plane to me. For comparison, here's a 767:
(11 Sep '16, 21:51)
SomeoneElse ♦
Yes I agreee, but the 40 m long plane seems to be flying very close to the ground, look at its shadow and no airfield around or closeby. Or is that normal due to the high position of the sun ?
(11 Sep '16, 22:50)
Hendrikklaas
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Here is another seen using Mapbox. Interesting to see the aircraft and blue ghostly image below and ground shadow further to south. The double image of the aircraft possibly due to high speed and different channels to process satellite images.
(12 Sep '16, 02:51)
nevw
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(12 Sep '16, 15:08)
neuhausr
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The link to Google Earth Blog from neuhausr explains the 'shadow' referred to by Hendrikklaas. I too thought that the plane must be flying close to the ground but now realise that the 'shadow' is actually the image of the plane taken with (probably) the blue filter. So, there is nothing to indicate the actual size or height of the aircraft. Indeed, the fact that there is no obvious ground shadow in the near vicinity implies that the aircraft is at quite a considerable height. I assume that the scale ruler in JOSM refers to distances 'on the ground' so it can't be used to estimate the size of the plane.
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