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Re: Satellite imagery...

By: lkorrow in CONSTITUTION | Recommend this post (0)
Mon, 03 Oct 11 2:24 AM | 95 view(s)
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Msg. 15472 of 21975
(This msg. is a reply to 15470 by DueDillinger)

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The base of the Statue of Liberty isn't exactly as geometrical as I thought it would be!




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The above is a reply to the following message:
Satellite imagery...
By: DueDillinger
in CONSTITUTION
Mon, 03 Oct 11 1:29 AM
Msg. 15470 of 21975

You'd best update your satellite view, mon. Commercial grade SPOT imagery is 2.5m/pixel these daze.

Most land areas are covered in satellite imagery with a resolution of about 15 m per pixel. This base imagery is 30m multispectral Landsat which is pansharpened with the 15m [panchromatic] Landsat imagery. However, Google is actively replacing this base imagery with 2.5m SPOTImage imagery and several higher resolution datasets mentioned below. Some population centers are also covered by aircraft imagery (orthophotography) with several pixels per meter. Oceans are covered at a much lower resolution, as are a number of islands; notably, the Isles of Scilly off southwest United Kingdom were at a resolution of about 500 m or less, although this has since been addressed.

http://en.wikipedia.org/wiki/Google_Earth

SPOT resolutions:
http://www.spotimage.com/web/en/233-resolution-and-spectral-bands.php

Below is a QuickBird image at 2.44m resolution.

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