Friday, April 24, 2020

x9 new layers based on Imray material added in the GeoGarage platform

1675 new nautical raster charts added (including Greece-Turkey-EastCaribbean)

Cuba (GeoCuba) new layer in the GeoGarage platform

187 nautical raster charts added
see GeoGarage news

 Royal Navy Map of Cuba (1762)


Map of Cuba - Nicolas Estevanez (1885)
National Geographic Map of Cuba (2011) 
 
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Satellites and AI team up to spot tiny ocean plastics

Satellite images don't have high-enough resolution, but this technique overcomes that limit to reveal plastic litter much smaller than a meter.
Floating Debris in Ghana :
Top: enhanced 'true colour' image of Ghanaian waters, bottom: suspected plastics become more visible by using the Floating Debris Index (FDI). Satellite imagery generated using the European Space Agency (ESA) open-source Sentinel Applications Platform (SNAP 6.0) software.

From AnthropoceneMag by Prachi Patel

Plastic debris floats around in the farthest reaches of the ocean. But finding it for cleanup isn’t easy.
Now researchers in the UK have for the first time used satellite data to detect patches of tiny plastic pieces floating in oceans.

The method can identify plastics down to 5 millimeters in size, as detailed in their Scientific Reports paper. It can also distinguish between plastics and natural materials.

Millions of tons of plastic debris enters the world’s oceans every year.
There it either floats on the surface or sink underneath.
Marine animals can ingest or get entangled in the larger pieces. And over time, the plastics break down into tiny particles called microplastics.


Capturing plastics before they cause harm or get broken down is essential for keeping marine ecosystems healthy.
Several ongoing and planned efforts plan to do that.
But they require a way to reliably track plastic litter in the oceans.

Satellites, which circle the Earth repeatedly taking high-resolution images on a global scale offer the best way to detect plastics floating in the oceans.
But even their resolution might not be good enough: plastic debris is much smaller than the smallest features that satellites can detect.

Lauren Biermann and her colleagues at the Plymouth Marine Laboratory have found a way around that by combining satellite data with artificial intelligence.
They use data from the Sentinel-2A and 2B Earth Observation satellites, which were launched by the European Space Agency (ESA) in 2015 and 2017.
The satellites have a spatial resolution of 10 meters, but they can detect multiple wavelengths of light.

 Researchers identified patches of floating debris based on their spectral signatures, which refers to the wavelengths of visible and infrared light the debris absorbed and reflected and an algorithm then further separates the items in the signature (pictured)

So the researchers look for the visible and infrared light signals that plastic reflects.
They use machine-learning algorithms to analyze the images pixel-by-pixel and see how much each pixel contains signals of different plastics versus natural debris.

The team tested their technique on satellite data from coastal waters in Accra, Ghana; the Gulf islands in Canada; Da Nang, Vietnam; and east Scotland.
They were able to identify all the different materials present in floating patches of mixed debris including plastics, seaweed, seafoam, and wood.
The method accurately classified plastics 86 percent of the time on average across the four locations, with an accuracy of 100 percent off the Gulf islands.

It should be possible to use this approach with drones and future high-resolution satellite missions, the researchers write in the paper.
“Being able to detect marine litter close to land may aid clean-up operations before discarded items are exported, fragmented, or sunk below the surface of the water.”

Source: Lauren Biermann et al. Finding Plastic Patches in Coastal Waters using Optical Satellite Data. Scientific Reports, 2020.

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Thursday, April 23, 2020

Croatia (HHI) layer update in the GeoGarage platform

24 rasterized HHI ENCs updated in the GeoGarage platform

All over the map: Forgotten giant of science who named Seattle’s Fauntleroy neighborhood

This 1869 nautical chart shows Fauntleroy Cove in what’s now West Seattle; it was named in 1856 or 1857 by surveyor George Davidson for Robert H. Fauntleroy of Indiana, his mentor and the late father of his future wife.
(NOAA Archives)
 Fauntleroy Cove in the GeoGarage platform (NOAA nautical raster chart)

From MyNorwest by Feliks Banel

With the West Seattle Bridge now closed, you can’t really get to Seattle’s Fauntleroy neighborhood and the Vashon-Southworth ferry very easily anymore.

But maybe – OK, it’s a longshot – you can find solace in knowing who Fauntleroy was named after, and about the forgotten giant of science who actually chose that name more than 150 years ago.

Fauntleroy Cove, where the Vashon ferry dock was first operated in the 1920s, was named in 1856 or 1857 by a U.S. Government surveyor named George Davidson.

A portrait of prolific surveyor and scientist George Davidson from the late 19th century.
(Public Domain)

Davidson was born in England in 1825 and came with his family to Philadelphia as a child.
Before he died in San Francisco in 1911, Davidson was to become one of the most accomplished and prolific scientists, historians and authors on the West Coast in the 19th and early 20th centuries.
By some measures, he was the DaVinci or Thomas Jefferson of the West Coast.

But where did the Fauntleroy name come from?

In the 1840s, Robert H. Fauntleroy was George Davidson’s colleague, perhaps his first boss, at the U.S. Coast Survey, the government agency that was a precursor to the National Ocean Survey and the U.S. Geological Survey, and that made charts and maps.

Fauntleroy also became a mentor to Davidson, who was then in his early 20s, by doing things like hosting Davidson for long periods of time at the family home in Harmony, Indiana.
In 1850, Robert Fauntleroy died of cholera when he was only 43 or 44 years old.

It was not long after this that George Davidson began a multi-year project to survey and chart the Pacific Coast.
Using information compiled during earlier surveys by Captain George Vancouver in the 1790s and by the U.S. Exploring Expedition in the 1840s, Davidson and his colleagues measured latitude and longitude of prominent points along the coast, and gathered information about the names given to areas by Natives as well as European visitors.

These government-funded projects were designed to facilitate commerce by making navigation safer, and thus Davidson also accomplished other important tasks along the way, such as choosing locations for lighthouses, buoys, and other navigation aids.

As part of this work, Davidson purchased a ship in 1854 in San Francisco on behalf of the government, and named it the R.H. Fauntleroy.

It was just a few years later, when his work brought him to the waters of what was then Washington Territory, that Davidson named Fauntleroy Cove in what’s now West Seattle, and also named the “Fauntleroy Peaks” in the Olympic Mountains: Mount Constance, Mount Ellinor, and The Brothers.

The names for those peaks, not surprisingly, come from Robert Fauntleroy’s four children (the real-life brothers were named Edward and Albert).
What is also probably not surprising, then, is that George Davidson married Ellinor Fauntleroy, daughter of his late mentor, in October 1858.

Along with the cove and the peaks, the name “Fauntleroy” was also attached for awhile to what’s now Lincoln Park, just north of the ferry terminal.

The “Lincoln” name had been used for a reservoir on Capitol Hill, as well as the adjoining park area, but that area was renamed “Broadway Playfield” in 1922, and what had been “Fauntleroy Park” was renamed in honor of the Civil War president.

In 1922, what had been Fauntleroy Park was renamed Lincoln Park by the City of Seattle; residents petitioned unsuccessfully to change it back in the 1930s.
(Seattle Municipal Archives)

Newspaper clippings from that time say that the area had been known as “Lincoln Beach” for many years, and that “Lincoln Beach” name does show up as early as 1904 in some real estate ads in the Seattle Times.
Broadway Playfield was renamed Cal Anderson Park in 2003.

In 1934, West Seattle residents petitioned the City of Seattle’s Parks Board to rename the park for Fauntleroy, but the effort did not succeed.
That same year, a “Golden-Rain” tree from the Fauntleroy family home in Indiana was planted for Arbor Day near the Lincoln Park gate.

It was still there in the late 1980s when Seattle tree expert and author Arthur Lee Jacobson wrote the first edition of his book Trees of Seattle, though Jacobson reported Thursday that the original 1934 tree is no longer standing.

And it was trees – lots and lots of trees sacrificed for paper pulp – that enabled George Davidson to make one more lasting contribution.

In addition to the nautical charts his team surveyed and drew that helped foster safety and expanded trade and commerce, Davidson created a one-of-a-kind resource that remains of immeasurable cultural value.

The ferry Klahanie served the Fauntleroy-Vashon run in the 1950s.
(Washington State Archives)

Beginning in the 1850s, Davidson compiled research and began to publish, through the U.S.
Coast Survey, detailed descriptions of headlands and harbors and other geographic features.

In the 1850s, US government surveyor George Davidson named Olympic peaks – Mount Ellinor, Mount Constance and The Brothers – for his future wife Ellinor Fauntleroy and her sister Constance, and her brothers Edward and Albert.

This was so that mariners might be better prepared as they traveled from port to port, especially if they were making their first visit.
The idea was that this written material would serve as a supplement, and an early form of maritime guidebook to be used along with the nautical charts.

The 1897 contoured map of Monterey Bay 1897 contoured map of Monterey "Submerged Valley". From George Davidson published paper in Proc. of Calif. Acad. of Sciences.
Monterey Canyon was first noted in 1857 by James Alden of C&GS Ship ACTIVE .
Alden termed the canyon a "submarine gulch."
Courtesy of the NOAA Image Libaray

The first version of Davidson’s work was published in 1855 as part of the agency’s regular annual report.
That section was called “Directory for the Pacific Coast.”


By 1869, the material warranted publication as its own separate volume.
It was renamed “Coast Pilot for California, Oregon and Washington Territory,” and it came to be an indispensable asset for West Coast mariners.
The same was true for Alaska, as Davidson produced similar works for that area, which had only been recently acquired by the United States.

Ultimately, the effort to update and expand the “Coast Pilot” for California, Oregon and Washington became a pursuit that took up much of Davidson’s “spare” time – in addition to his multiple other scientific pursuits – and culminated in the mammoth 1889 edition.

That 1889 volume is a real doorstop, coming in at almost 900 pages.
It reads like an explorer’s log book, with details about the culture and history of many places along the coast – which isn’t surprising, given how much Davidson studied (and later wrote about) the early West Coast explorers.

Davidson spent nearly 10 years working on the 1889 edition of the Coast Pilot on his own time, and the resulting book is an often overlooked masterpiece of West Coast history.

Unfortunately for scholars – but perhaps fortunately for sailors who probably didn’t need a multi-pound encyclopedia – subsequent editions of the Coast Pilot would be trimmed of most of the historical and cultural material that made the 1889 edition such a treasure.

But, to Davidson’s credit, the government expanded the Coast Pilot program to cover all American waters, and Coast Pilots are still published (and updated regularly) by the National Oceanic and Atmospheric Administration.

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