sir_ivar's Most Recent Replies To Comments

Waikoloa Abrader Quarry

Thu, 25 Nov 2010 12:34:51 Z

by tbenedict "This is a synth of the Waikoloa Abrader Quarries found adjacent to the King's Trail near Anaehoomalu Bay. These were all made with roughly 300' of line between me and the camera. Wind was varied, so the actual altitude was all over the place. Largely, though, it was in the 200' AGL + range. The King's Trail is also visible in this set, as is the heiau that delineates the division between the Kona and Kohala districts. The road that goes out to that heiau also connects to a radio tower complex in the other direction. These landmarks can all be found on most mapping software. So even though the photos themselves are not georeferenced, there are enough clue frames to do so. Visible in this set are abrader quarries as well as work sites, or basins. I wasn't sure these would be visible from 200'+ altitude, but surprisingly they are. Also visible are a number of petroglyphs, as well as some graffiti dating back to the 1800's. Not bad. This set included no oblique views to help tie the large scale geometry down, but the resulting synth was actually quite flat anyway."

sir_ivar Over 1 year ago

Outstanding!

Acaray Sector A Point Cloud for DEM test

Sun, 31 Jan 2010 17:21:05 Z

by Nathan.Craig "This synth is part of my efforts to generate a point cloud for export to DEM that is in real world coordinates. The photographs were taken with a Canon G11 and downsampled to roughtly 3.8 megapixels. Cones were used as control point targets. The real world coordinates of the cones were established by a ProXRT GPS with Omnistar (10cm accuracy). IIt took about 15 minutes to set out the cones, another 15 minutes to take the photos, and another 10 minutes to collect the GPS data on the 12 cones. While the point cloud has a suitable density, I did not get very good recognition of the control point targets (the cones). If anyone has suggestoins for better photo-targets to use in these contexts, I would be very grateful for comments or suggestions. Perhaps it would have been good to take additional photos of the targets with a zoom lens?"

pdepartida Over 1 year ago

I`m thinking that you should run the pictures into PMSV2. The GCP markers will show up there.

Kona Coastline

Tue, 23 Mar 2010 19:27:22 Z

by tbenedict "A first pass at an aerial orthogonal composite. (I hesitate to call this thing a "pano" since there's nothing panoramic about it.) 51 photos made using a camera suspended from a kite line. In this case the camera was being towed behind a boat, and the shutter was set to fire continuously while the camera was aimed straight down. So it's a planar motion rather than a rotating motion of a fixed camera base."

sir_ivar Over 1 year ago

Awesome job Tom! Keep up the great work. Always impressed with your images.

latcui22-latitude 45

Sat, 07 Nov 2009 12:38:36 Z

by alexhaw "latitudinal shift: a tribute to mexico (the people's monument)"

sir_ivar Over 1 year ago

Very awesome! Thanks for doing this and sharing.

Long Meg & Her Daughters

Tue, 29 Sep 2009 12:28:37 Z

by PGRic "Long Meg and Her Daughters, is a probable Bronze Age stone circle near Penrith in Cumbria, England. The number of stones used in the circle seems pretty liquid judging from the number of stones quoted by different sources. I didn’t check on the ground, but aerial photography suggests 68, although more may have originally been present. The Long Meg part of the name derives from the 3.5m high monolith, approx 17m southwest of the main circle. Long Meg is different geology to the rest of the stones, being comprised of red sandstone. In addition to the geology, Long Meg also has a number of motifs belonging to the ‘cup and ring’ tradition on the east vertical face. Some have suggested that the different geology and carvings may indicate that Long Meg had already been in situ prior to the stone circles construction. Others have argued that the same evidence indicates that the stone may have been brought from several miles away, with the already existing carvings being hewn from an outcrop and transported in. All good healthy debate, but probably something we’ll never know for sure. Another topic of debate about Long Meg is the apparent notch on top: fractured naturally or carved."

Peter Over 1 year ago

This is a neat synth, good use of highlights.

Holy Ghost in Horseshoe Canyon

Mon, 29 Jun 2009 18:29:25 Z

by billfeely "Human presence in Horseshoe Canyon has been dated as far back as 7000-9000 B.C., when Paleo-Indians hunted large mammals such as Mastodons and Mammoths across the southwest. Later inhabitants included the Desert Archaic culture, the Fremont culture, and Ancestral Pueblo People. Occupation by the Fremont and Ancestral Puebloans was relatively brief; it is believed that the canyon was abandoned by Native American peoples by 1300 A.D. The Great Gallery is one of largest and best preserved collections of Barrier Canyon Style rock art in the United States. The gallery was a product of the Desert Archaic culture, a nomadic group of hunter-gatherers predating the Fremont and Ancestral Puebloans. The panel itself measures about 200 feet (61 m) long and 15 feet (4.6 m) high. The panel contains about 20 life-sized anthropomorphic images, the largest of which measures over 7 feet (2.1 m) tall. Reproductions showing the haunting beauty of the paintings are in the Museum of Modern Art in New York and the Denver Natural History Museum."

sir_ivar Over 1 year ago

These pictographs are extremely similar to the petroglyphs at Alamo Mountain in Southern New Nexico. Definately tecolote-like stuff.

Thanks for sharing!

One Rock

Tue, 22 Sep 2009 12:25:51 Z

by G--MAN

sir_ivar Over 1 year ago

Nice point cloud on the rock!

Aboriginal engraved rock-art (petroglyth)- "Big-Fella"

Thu, 11 Sep 2008 08:58:55 Z

by cvjhc

sir_ivar Over 1 year ago

Chandler? Check this out:

http://www.youtube.com/watch?v=TuHJUS2olyc&feature=channel_page

Lot's of potential here. -Mark W.

Waimea (Kamuela) - Kite Aerial

Sat, 30 May 2009 20:57:30 Z

by tbenedict "Our Town Waimea (or Kamuela, as it's known to the US Postal Service) is still a fairly small town toward the north end of the Big Island of Hawai`i. It sits at the foot of Kohala Mountain, visible in this synth. The synth was made using a camera suspended from a kite line. The kite was being flown in the athletic fields at Waimea Middle School. The synth was done using a Brooks BBKK KAP rig, which provides pan and tilt control, as well as shutter control over the camera. For this the shutter was actuated using a combination of a really neat device called a GentLED-CHDK, which is a smart cable with an RC servo plug on one side and a USB plug on the other. One end goes into the RC receiver, the other goes into the camera's USB port. When used on a camera running CHDK (Canon compact cameras only), it's possible to trigger the shutter electronically. The camera was set to continuous shutter mode, the rig was set to spinning, and the shutter was actuated. The result was three panoramas and this synth."

sir_ivar Over 1 year ago

Very sweet KAS (Kite Aerial photoSynth)! Your work is always incredible.

-Mark