File:Heiltskuk Icefield, British Columbia.JPG
Original file (4,256 × 2,829 pixels, file size: 2.43 MB, MIME type: image/jpeg)
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Summary
editDescriptionHeiltskuk Icefield, British Columbia.JPG |
English: This detailed astronaut photograph illustrates the ice-field—mostly covered by snow across the upper mountain slopes—and two major valley glaciers that extend from it. The locations of former valley glaciers can frequently be identified by the presence of these U-shaped valleys on a now glacier-free landscape. The two largest valley glaciers in the image, Silverthrone Glacier and Klinaklini Glacier, both flow towards Knight Inlet to the south (not shown). Several moraines—accumulations of rock and soil debris along the edges and surface of a glacier—are drawn out into long, dark lines by the flowing ice, and they extend along the length of both glaciers. The confluence of the two glaciers at image centre illustrates how a moraine located along the side of a glacier can become a medial moraine, in the centre of the joined ice mass. Smaller valley glaciers are visible near Mount Silverthrone. |
Date | |
Source | NASA Earth Observatory |
Author | NASA Expedition 20 crew |
Camera location | 51° 30′ 00″ N, 125° 54′ 00″ W | View this and other nearby images on: OpenStreetMap | 51.500000; -125.900000 |
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This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: ISS020-E-29216. This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing. Other languages:
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Image acquired with a Nikon D3 digital camera fitted with a 400 mm lens, and is provided by the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory, Johnson Space Center.
Licensing
editPublic domainPublic domainfalsefalse |
This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
Warnings:
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Annotations InfoField | This image is annotated: View the annotations at Commons |
Silverthrone Glacier
Klinaklini Glacier
glacier confluence
Mount Silverthrone
File history
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current | 11:03, 3 June 2010 | 4,256 × 2,829 (2.43 MB) | Originalwana (talk | contribs) | {{Information |Description={{en|1=This detailed astronaut photograph illustrates the ice-field—mostly covered by snow across the upper mountain slopes—and two major valley glaciers that extend from it. The locations of former valley glaciers c |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D3 |
Exposure time | 1/2,500 sec (0.0004) |
F-number | f/5.6 |
ISO speed rating | 200 |
Date and time of data generation | 21:57, 6 August 2009 |
Lens focal length | 400 mm |
Orientation | Normal |
Horizontal resolution | 240 dpi |
Vertical resolution | 240 dpi |
Software used | Microsoft Windows Photo Gallery 6.0.6001.18000 |
File change date and time | 11:57, 3 June 2010 |
Exposure Program | Aperture priority |
Exif version | 2.21 |
Date and time of digitizing | 21:57, 6 August 2009 |
APEX shutter speed | 11.287712 |
APEX aperture | 4.970854 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire |
DateTime subseconds | 16 |
DateTimeOriginal subseconds | 16 |
DateTimeDigitized subseconds | 16 |
Color space | sRGB |
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 |
Focal length in 35 mm film | 400 mm |
Scene capture type | Standard |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |