2 new raster charts added + 64 updated in the GeoGarage platform
see GeoGarage news
Sunday, February 26, 2017
Underwater mobile dynamic mapping
On July 15th, 1942, the German U-boat 576 was sunk off the coast of North Carolina.
Today, you can see an amazing 3D image of U-576 in the form of processed point cloud.
Today, you can see an amazing 3D image of U-576 in the form of processed point cloud.
This was created using a revolutionary new dynamic underwater mobile scanning technique using lasers.
Using Sonardyne’s LBL acoustic positioning technology, coupled with SPRINT INS, Syrinx Doppler navigation and 2G Robotics’ ULS-500 laser mounted to a manned submersible, NOAA were able to fly over the sunken U-boat whilst simultaneously taking continuous laser scans.
DOF Subsea, Sonardyne, 2G Robotics, and Seatronics successfully demonstrated a new underwater surveying technique that could significantly shorten the time needed to map underwater structures and offshore sites.
The new technique uses a 3D laser scanner fitted to an ROV to create highly detailed, point cloud images of subsea assets and environments.
By combining the 3D laser data with precise underwater acoustic and inertial navigation information, it is now possible to generate centimetre resolution engineering models from which accurate measurements can be instantaneously and repeatably captured.
2G Robotics collaborated with the National Oceanic and Atmospheric Administration (NOAA) at the Thunder Bay National Marine Sanctuary to document America’s maritime heritage.
2G Robotics and NOAA, with the assistance of Offshore Analysis & Research Solutions (OARS), used 2G Robotics’ underwater laser scanning technology to create 3D models of some of America’s most nationally significant shipwrecks.
(other video / video)
Using Sonardyne’s LBL acoustic positioning technology, coupled with SPRINT INS, Syrinx Doppler navigation and 2G Robotics’ ULS-500 laser mounted to a manned submersible, NOAA were able to fly over the sunken U-boat whilst simultaneously taking continuous laser scans.
DOF Subsea, Sonardyne, 2G Robotics, and Seatronics successfully demonstrated a new underwater surveying technique that could significantly shorten the time needed to map underwater structures and offshore sites.
The new technique uses a 3D laser scanner fitted to an ROV to create highly detailed, point cloud images of subsea assets and environments.
By combining the 3D laser data with precise underwater acoustic and inertial navigation information, it is now possible to generate centimetre resolution engineering models from which accurate measurements can be instantaneously and repeatably captured.
2G Robotics collaborated with the National Oceanic and Atmospheric Administration (NOAA) at the Thunder Bay National Marine Sanctuary to document America’s maritime heritage.
2G Robotics and NOAA, with the assistance of Offshore Analysis & Research Solutions (OARS), used 2G Robotics’ underwater laser scanning technology to create 3D models of some of America’s most nationally significant shipwrecks.
(other video / video)
Links :
Saturday, February 25, 2017
This might be the prettiest footage of surfing giant Maverick's we've ever seen
Maverick's, in Half Moon Bay, California, is one of the surfing's most
menacing and dangerous big waves.
This edit shows exactly why.
NOAA nautical chart with the GeoGarage platform
High resolution mapping of Mavericks
(courtesy of Sanctuary Simon & Fugro)
Just 20 minutes south of San Francisco, and 1/2 mile offshore from
Pillar Point Harbor, Maverick’s rises from the wintery horizon to form
perfect, massive waves that reach up to 60 feet.
(courtesy of Sanctuary Simon & Fugro)
Just 20 minutes south of San Francisco, and 1/2 mile offshore from
Pillar Point Harbor, Maverick’s rises from the wintery horizon to form
perfect, massive waves that reach up to 60 feet. 
...exploding with such
ferocity that it can be recorded on the Richter scale.
see SFGate
Links :
- NewScientist : Map reveals secret of awesome Mavericks waves
- Surfline : Mechanics of Mavericks
- GeoGarage blog : Surfing Mavericks : aerial footage
Friday, February 24, 2017
The Ottoman Empire’s first map of the newly minted United States
Click on the image to reach a zoomable version,
or visit the map's page in the digital collections of the Osher Map Library,
University of Southern Maine.
From Business Insider by Nick Danforth
What did the United States look like to Ottoman observers in
1803?
In this map, the newly independent U.S. is labeled “The Country of the English People” (“İngliz Cumhurunun Ülkesi”).
The Iroquois Confederacy shows up as well, labeled the “Government of the Six Indian Nations.” Other tribes shown on the map include the Algonquin, Chippewa, Western Sioux (Siyu-yu Garbî), Eastern Sioux (Siyu-yu Şarkî), Black Pawnees (Kara Panis), and White Pawnees (Ak Panis).
In this map, the newly independent U.S. is labeled “The Country of the English People” (“İngliz Cumhurunun Ülkesi”).
The Iroquois Confederacy shows up as well, labeled the “Government of the Six Indian Nations.” Other tribes shown on the map include the Algonquin, Chippewa, Western Sioux (Siyu-yu Garbî), Eastern Sioux (Siyu-yu Şarkî), Black Pawnees (Kara Panis), and White Pawnees (Ak Panis).
The Ottoman Empire, which at the time this map was drawn
included much of the Balkans and the Middle East, used a version of the
Turkish language written in a slightly modified Arabic script. Ottoman
script works particularly well on maps, because it allows cartographers
to label wide regions by elongating the lines connecting individual
letters.
This appears to be the first Ottoman map of the United
States, but Ottoman maps of North America have a much longer history.
The first were the 16th-century nautical charts of the famous Ottoman cartographer Piri Reis. Some of the last, drawn before the new Turkish Republic switched to Latin script in 1928, show air routes spanning the continental U.S.
The first were the 16th-century nautical charts of the famous Ottoman cartographer Piri Reis. Some of the last, drawn before the new Turkish Republic switched to Latin script in 1928, show air routes spanning the continental U.S.
American relations with the Ottoman Empire in the 19th century
were either commercial or missionary.
American missionaries to the empire first tried to win Christian converts.
But after meeting with little success, they turned to creating schools to spread the much more popular American gospel of English fluency and engineering excellence.
American missionaries to the empire first tried to win Christian converts.
But after meeting with little success, they turned to creating schools to spread the much more popular American gospel of English fluency and engineering excellence.
At times, the mercantile and missionary impulses came into
conflict, such as when Greek Christians rebelled against the Ottoman
sultan.
Many Americans felt their government had a moral duty to stand with co-religionists against a Muslim despot.
The U.S. government, however, felt a more pressing duty to stand with its merchants and sea captains, who’d been doing brisk business with the sultan.
Supposedly, it was in recognition of U.S. support of the establishment that the empire later sided with the Union during America’s own civil war.
Links :
Many Americans felt their government had a moral duty to stand with co-religionists against a Muslim despot.
The U.S. government, however, felt a more pressing duty to stand with its merchants and sea captains, who’d been doing brisk business with the sultan.
Supposedly, it was in recognition of U.S. support of the establishment that the empire later sided with the Union during America’s own civil war.
Links :
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