File:Salt_ponds,_South_Bay,_SF.jpg
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![File:Salt ponds, South Bay, SF.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/5/55/Salt_ponds%2C_South_Bay%2C_SF.jpg/521px-Salt_ponds%2C_South_Bay%2C_SF.jpg)
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Summary
DescriptionSalt ponds, South Bay, SF.jpg | High power electrical supply towers and lines cross salt ponds of the South Bay. Salt evaporation ponds formed by salt water impounded within levees in former tidelands on the shores of San Francisco Bay. There are many of these ponds surrounding the South Bay. As the water evaporates, micro-organisms of several kinds come to predominate and change the color of the water. First come green algae, then darkening as orange brine shrimp predominate. Finally red predominates as dunaliella salina, a micro-algae containing high amounts of beta-carotene (itself with high commercial value), predominates. Other organisms can also change the hue of each pond. Colors include red, green, orange and yellow, brown and blue. Finally, when the water is evaporated, the white of salt alone remains. This is harvested with machines, and the process repeats. |
Date | |
Source |
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Author | Doc Searls from Santa Barbara, USA |
Object location | 37° 28′ 50.22″ N, 122° 01′ 28.46″ W ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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Licensing
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This image, originally posted to Flickr, was reviewed on January 22, 2010 by the administrator or reviewer File Upload Bot (Magnus Manske), who confirmed that it was available on Flickr under the stated license on that date. |
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26 November 2009
37°28'50.225"N, 122°1'28.459"W
0.0025 second
11.614 millimetre
100
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:00, 22 January 2010 | ![]() | 2,376 × 2,736 (4.52 MB) | File Upload Bot (Magnus Manske) | {{Information |Description=High power electrical supply towers and lines crosss salt ponds of the South Bay. Salt evaporation ponds formed by salt water impounded within levees in former tidelands on the shores of San Francisco Bay. There are many of thes |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot SD1200 IS |
Exposure time | 1/400 sec (0.0025) |
F-number | f/4 |
ISO speed rating | 100 |
Date and time of data generation | 11:49, 26 November 2009 |
Lens focal length | 11.614 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop CS3 Macintosh |
File change date and time | 22:49, 26 November 2009 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 11:49, 26 November 2009 |
Image compression mode | 3 |
Shutter speed | 8.65625 |
APEX aperture | 4 |
Exposure bias | 0 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Color space | sRGB |
Focal plane X resolution | 15,136.929460581 |
Focal plane Y resolution | 15,116.022099448 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
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