Topics not related specifically to Anza Borrego
Oldest North America rock art site identified
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ziphius Posts: 911
8/19/2013
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http://www.livescience.com/38865-oldest-petroglyphs-rock-art.html
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http://www.coyotelearning.org
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tommy750 Posts: 1049
8/21/2013
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Jim (ziphius) wrote:
http://www.livescience.com/38865-oldest-petroglyphs-rock-art.html
Saw that in the news. Very interesting. The actual article link with a free(pay wall of $31.50 for the full text article) abstract including pics/graphs is here: http://www.sciencedirect.com/science/article/pii/S0305440313002288
Kinda reminded me of the tufa petroglyphs near the Valerie Jean fish traps. Not aware if they've been dated but are obviously not nearly as old. C-14 dating of tufa is apparently very complex since it's not entirely composed of "fresh" atmospheric C-14. Thanks. Tom
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ziphius Posts: 911
8/22/2013
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Slightly related, a 'new' photographic tool to create gigapixel images, applied to a petroglyph site in Texas. Based on stitching together high-resolution images, used by Mars Rover. The resolution is absolutely scary! Zoom in and find the petroglyphs, approximately just north and west of of the center of the area, in the 'warmest brown' region. Extensive number of glyphs! You can also zoom in on the scale / legend in the lower right corner to see how they obtained the imagery from the ground:
http://www.gigapan.com/gigapans/136529
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tommy750 Posts: 1049
8/22/2013
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Jim (ziphius) wrote:
Slightly related, a 'new' photographic tool to create gigapixel images, applied to a petroglyph site in Texas. Based on stitching together high-resolution images, used by Mars Rover. The resolution is absolutely scary! Zoom in and find the petroglyphs, approximately just north and west of of the center of the area, in the 'warmest brown' region. Extensive number of glyphs! You can also zoom in on the scale / legend in the lower right corner to see how they obtained the imagery from the ground:
http://www.gigapan.com/gigapans/136529
I'm having a hard time figuring out the scale on the pic! Can't tell if I'm looking at boulders or pebbles. Also has a weird 3D effect presumably from the different times of day it was shot. Nice pic. Tom
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dsefcik Administrator Posts: 2622
8/22/2013
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Yeah, that was kinda interesting...petros on the ground..? I would imagine if they walked around with a camera on a pole taking pictures of the ground the resolution would be good. The most I have ever stitched together has been 88 images. Thanks for the post.
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