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Ice contact delta sediments, Salisbury, Vermont by Chris Fastie

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About This Gigapan

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Taken by
Chris Fastie Chris Fastie
Explore score
107
Size
0.92 Gigapixels
Views
5616
Date added
Oct 15, 2009
Date taken
Oct 14, 2009
Gear

Nikkor 300mm f/4.5 AI-s, Nikon...

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Description

As the Laurentide glacier retreated from the Champlain Valley 13,600 years ago, the ice damned the valley and Glacial Lake Vermont rose to about 170 m (550 feet) above sea level, which is the elevation of the camera. This sand and gravel was carried by an ice-marginal river that built kame terraces until it reached the lake where it dumped fine sediments into the standing water forming a delta more than 4 km long.

This quarry is the source of material that is spread on snow-covered roads in Salisbury. It is being sorted and stockpiled this month.

This gigapan can be seen in its geographic context here: conservation.townofsalisbury.org/panoramas/townforest/index.htm Will open in a new tab or window
Notes: I used a Nikon D40 with Nikkor 300mm f/4.5 AI-s lens, f/8, 1/160 second, ISO 200, NEF. 35mm equiv is 450mm. Field of view set to 3 degrees.


Gigapan Comments (2)

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  1. Chris Fastie

    Chris Fastie (October 17, 2009, 11:42AM )

    That’s a good question. Does the 6 megapixel D40 record more useful information than a 10 megapixel Canon SX10 (with a smaller sensor)? There are a lot of variables that make the answer hard to get at, not the least of which is the SX10’s 565 mm lens (equiv). The resolving power of my lesser telephoto lenses never seems to exceed the resolution of the 6 megapixel sensor (so more pixels would not increase the useful information). Which raises the question: With long lenses, does the D40 record any less information than the D90 (12 megapixels, same size sensor)? For $850, I will have at it. Lightroom produces the Jpegs. Thanks for your interest.

  2. Jason Buchheim

    Jason Buchheim (October 17, 2009, 10:41AM )

    Chris, this is very nice. The information content in the image is very high. The Nikon DSLR combination with a quality Nikkor lens is producing images with much more true 'information' than the little sensor cameras can produce. Looking at this image and zooming in to the 300% on the viewer, I beleive its like looking at a 5 Gigapixel image shot by a small sensor digicam. This is quite interesting. What do you use to convert the .NEF format before stitching? I wish I could quantify what I mean by 'information' better- I mean the signal to noise ratio on your D40 source panoramas seems much higher than most digicam panoramas I view on this site. Good job!

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Where in the World is this GigaPan?

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Stitcher Notes

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GigaPan Stitcher version 0.4.4090 (Windows)
Panorama size: 924 megapixels (84424 x 10948 pixels)
Input images: 336 (48 columns by 7 rows)
Field of view: 126.0 degrees wide by 16.3 degrees high (top=7.9, bottom=-8.4)
Settings:
All default settings
Original image properties:
Camera make: NIKON CORPORATION
Camera model: NIKON D40
Image size: 3008x2000 (6.0 megapixels)
Capture time: unknown
Aperture: unknown
Exposure time: unknown
ISO: unknown
Focal length (35mm equiv.): unknown
White balance: unknown
Exposure mode: unknown
Horizontal overlap: 40.0 to 44.9 percent
Vertical overlap: 22.6 to 28.3 percent
Computer stats: 3581.58 MB RAM, 2 CPUs
Total time 2:15:16 (0:24 per picture)
Alignment: 35:56, Projection: 11:18, Blending: 1:28:01

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