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Qori Kalis outlet glacier at Quelccaya Ice Cap - 2012 by Doug Hardy

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Taken by
Doug Hardy Doug Hardy
Explore score
1
Size
3.07 Gigapixels
Views
5178
Date added
Jul 23, 2012
Date taken
Jul 15, 2012
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Description

Panorama of Qori Kalis glacier and the valley below, in the Cordillera Vilcanota of Peru.

Recession of this outlet glacier - the largest flowing from Quelccaya Ice Cap - has been exceptionally well documented by Henry Brecher and Lonnie Thompson of Ohio State University. In the late-1980s there was no lake (see slide #43 at www.geo.umass.edu/climate/quelccaya/fieldwork_2012 Will open in a new tab or window/); the glacier was against recessional moraines (not visible here). Today the lake covers ~34 hectares and has a maximal depth of ~60 meters.

For additional information on the ice retreat, see: Brecher & Thompson, 1993 (Photogrammetric Engineering and Remote Sensing, vol. 590) and Thompson et al., 2006 (Proc. of the Natl. Acad. Sci., vol. 103)

There is a remarkable amount of detail visible in this 170° view, comprised of nearly 1000 megabytes of data(!) - all provided via a "point and shoot" camera mounted on the GigaPan. The "Stitcher Notes" contain more information about the photos. Note for example that the original photos were slightly under-exposed, requiring a bit of post-processing to make shadow detail visible.

Better detail of the glacier is available in #110306 (<
gigapan.com/gigapans/110306>;)


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Stitcher Notes

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GigaPan Stitch.Efx version 2.0.0501 (Windows)
Panorama size: 3074 megapixels (106312 x 28916 pixels)
Input images: 615 (41 columns by 15 rows)
Field of view: 168.5 degrees wide by 45.8 degrees high (top=16.9, bottom=-28.9)
Settings:
Vignette correction on: c1=0.0474 c2=-0.034
All default settings
Original image properties:
Camera make: Canon
Camera model: Canon PowerShot SX120 IS
Image size: 3648x2736 (10.0 megapixels)
Capture time: 2012-07-15 14:26:32 - 2012-07-15 14:59:00
Aperture: f/8
Exposure time: 0.0005
ISO: 80
Focal length (35mm equiv.): 361.4 mm
Digital zoom: off
White balance: Fixed
Exposure mode: Manual
Horizontal overlap: 27.7 to 38.9 percent
Vertical overlap: 28.5 to 45.8 percent
Computer stats: 6141.55 MB RAM, 4 CPUs
Total time 55:29 (5.4 seconds per picture)
Alignment: 24:51, Projection: 6:23, Blending: 24:15
(Preview finished in 36:16)
Color Adjustments:
gamma: 0.72
exposure: 2.0
saturation: 1.10

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