Google Earth Community: Data Problems Compendium, v 1041, 5 August 2008

Data Problems > Image Blemishes > Reflections

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There are several types of these image blemishes:
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Bright flashes: Examples in France, Germany, Japan, the UK, and the USA.

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Dutch diamonds: beautiful 10-pointed stars in Austria, Belgium, France, Germany, and the Netherlands

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Flares (only in DigitalGlobe high-resolution images)

Unidirectional Flares - the most common
---- South-pointing flares: Large global collection in world cities. These are the most common, because most high-resolution images are north-south orientated. AZTraveller provides a very detailed explanation HERE

---- Non-south-pointing: Large global collection of such flares. They follow the direction of satellite travel. This effect was first noted by saukko HERE They almost all point in a variety of southerly directions. The only known exceptions were those in Formia, Italy, which have now been replaced by new imagery.
Bidirectional Flares - rare
---- West and south bidirectional flares with examples in Canada Iceland, Iran, Japan, Morocco, and the USA. As with unidirectional flares, the usual satellite direction is south-pointing, so is the primary direction in bidirectional flares.

---- Other than west and south bidirectional flares: China and Gibralter - very rare.

---- Somewhat northerly-pointing bidirectional flare: Caracas, Venezuela is the only known instance
Multidirectional flares
---- "Flare Island" The majority of the very numerous flares on Indonesia's Pulau Lagong (Lagong Island) are typical south-pointing. There is also a large number of bidirectional flares. However, a few unique groups of flares are west-pointing, and the eastern sides of those groups have been clipped in a vertical line.

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Oceanic low-resolution bright bars are apparent reflections in oceanic coastal areas in the TerraMetrics global background images. We show examples in Algeria, Canada, Libya, and Russia.

Edited by PriceCollins (03/16/08 05:28 PM)

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