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Cap Blanc-Nez (literally "Cape White Nose" in English; from Dutch Blankenesse, white headland) is a cape on the Côte d'Opale, in the Pas-de-Calais département, in northern France, culminating at 134 m. The cliffs of chalk are very similar to the white cliffs of Dover at the other side of the Channel in England. Cap Blanc-Nez does not protrude into the sea like a typical cape, but is a high point where a chalk ridge has been truncated by the sea, forming a cliff that is topped by the obelisk of the Dover Patrol Monument, commemorating the Dover Patrol which kept the Channel free from U-boats during World War I.
Cap Blanc-Nez was a vital measuring point for the eighteenth-century trigonometric survey linking the Paris Observatory with the Royal Greenwich Observatory. Sightings were made across the English Channel to Dover Castle and Fairlight Windmill on the South Downs. This Anglo-French Survey was led in England by General William Roy.
Some miles away to the southwest of Cap Blanc-Nez is the Cap Gris-Nez.
Cap Blanc-Nez (Nederlands: Kaap Blankenes; verouderd: Blankenesse, "witte nes"; een nes is een landtong) is een kaap aan het Kanaal bij de Franse gemeente Escalles in het departement Pas-de-Calais. Haar top ligt 134 m boven de zeespiegel.
Cap Blanc-Nez ligt 16 km ten noordoosten van Cap Gris-Nez. De kaap is te voet en per auto te bereiken. Er is een wandelpad van de top van de kaap tot aan het strand.
Plaatsnamen in deze streek verwijzen vaak naar het Middelnederlands. De verfransing gebeurde eerst tussen de 15de en de 17de eeuw. Blackenest is een benaming van de kaap die in geschriften uit de 16de eeuw wordt teruggevonden waarbij black verwijst naar het oudnederlandse woord blanka wat zoveel als helder of blank betekent. Nest verwijst naar nessa wat vooruitstekend stuk land in water betekent.
Cales Cliff is een andere benaming van de kaap die stamt uit de tijd toen het gebied nog aan de Engelsen toebehoorde.
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Have a great weekend !!!
3 Grey Lag Geese that were part of a combination of flocks at RSPB Old Moor, Barnsley, South Yorkshire. Many birds were gathering to feed up, prior to migration.
♪ Steve Hogarth / Richard Barbieri - Red Kite ♪
A red kite ..hanging in the sky
Motionless against the wind
A red kite is hanging in the sky
A red kite.
A red kite is hanging in the wind
A red kite is hanging in the sky
Motionless against the wind
While below, the suicides rush by
The red light waits ahead for me
While the red kite is hanging in the sky
Motionless against the wind
Motionless against the scudding cumuli
Golden cylinders of hay
In the low Autumn sunlight
Surreal alien's trigonometry agains the fields
Waiting patiently for flying saucers
The red kite is hanging on the air
As the traffic hurries everywhere
As you and I go running here and there
Below the red kite's emotionless unending stare
Oh my God, the cars..
Oh my God, the cars..
Turning left and right
In and out of town
What goes in..
What goes up..
The red kite is dancing in the sky
Fixing her steady eye
On some little thing
About to die.
Das Cap Blanc-Nez (Blanc-Nez „weiße Nase“) ist eine Landspitze an Frankreichs Ärmelkanalküste, die in diesem Bereich Côte d’Opale genannt wird, Es befindet sich südlich von Calais. Zusammen mit dem Cap Gris-Nez bildet es die „Gegend der zwei Kaps“ (Site de deux Caps), die im Süden von Boulogne-sur-Mer abgeschlossen wird.
Das Cap Blanc-Nez besteht aus Kreidegestein und Mergel und hat steil abfallende Seiten zum Meer. Es zählt zu den "Grand sites de France' seit 2011.Die Höhe der Felsen beträgt 134 m.
Entlang der gesamten Küste weisen zahlreiche Gedenksteine und Monumente auf die Schrecken des Ersten und Zweiten Weltkriegs hin.
Die Spuren an diesem strategisch wichtigen Ort sind auch anhand einer Bunkeranlage auf dem Gipfel des Cap Blanc-Nez und zahlreichen, noch immer gut sichtbaren Bombenkratern erkennbar...Mahnmale unserer Geschichte...
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De Dunquerque à Berck s'étend le paysage sauvage de la Cote d'Opale dessiné par des falaises escarpées, des valées crantées et un chapelet de dunes.
La Corniche de la Cote d'Opale, aussi nommée Terre des Deux Caps, car elle reunit le Cap Blanc-Nez et le Cap Gris-Nez, en est la partie la plus spectaculaire. Grand site de France depuis 2011, la Terre des Deux Caps marque la transition entre dunes et falaises.
Cap Blanc-Nez:
Reconnaisable de loin, surmonté d l'obélisque de la Dover Patrol,
qui fut erigé enmémoire des marins fancais et anglais morts pendant la Première Guerre mondiale en défendant le détroit du Pas-de-Calais.
Du haut du Cap, le spectacle est vertiginieux : la masse verticale de la falaise, à 134 m de haut, surplombe le 'pas' et son trafic incessant de navires.
www.grandsitedefrance.com/extranet/35-photos.html
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Cap Blanc-Nez (literally "Cape White Nose" in English) is a cape on the Côte d'Opale, in the Pas-de-Calais département, in northern France. The cliffs of chalk are very similar to the white cliffs of Dover at the other side of the Channel in England. Cap Blanc-Nez does not protrude into the sea like a typical cape, but is a high point where a chalk ridge has been truncated by the sea, forming a cliff that is topped by the obelisk of the Dover Patrol Monument, commemorating the Dover Patrol which kept the Channel free from U-boats during World War I.
Cap Blanc-Nez was a vital measuring point for the eighteenth-century trigonometric survey linking the Paris Observatory with the Royal Greenwich Observatory. Sightings were made across the English Channel to Dover Castle and Fairlight Windmill on the South Downs. This Anglo-French Survey was led in England by General William Roy.
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Wishing you a happy new week, dear friends,
thanks for stopping by :-)
•*¨*•♫♪¸¸.•*¨*•♫♪¸¸.•*¨*¨*•.•*¨*•♫♪•*¨*•♫♪¸¸.•*¨*•♫♪¸¸.
A view of Nelson from the "Centre of New Zealand". The geographical "centre of New Zealand" allegedly lies in Nelson; on a hilltop near the centre of the city. This is the point "zero, zero" from which the first trigonometrical surveys were started in the 1870s.
Trigonometry, anyone?
Love reading (not trig, however). Love books.
FlickrFriday: #InBetween (pages)
7 Days with Flickr: Lunes: Tema libre/Mondays: Free Theme
Thanks for looking and for your kind words and faves.
Playing 'nature Tetris' from Greyhound Rock, looking back across the little channel to shore. Norcal summer fog...
or, if you want to, much better Large on black
Log(uv) = log u + log v Think base 10! And then came the calculator, but, we used to do it this way.
Used primarily for multiplication and division, and for functions such as exponents, roots, logarithms, and trigonometry
The trig point at the summit of Pressendye with the hills and Highlands beyond.
Pressendye is just a small Graham of 620 meters (2034 feet), but a 15 Km (9 mile) circuit definitely stretched the legs.
Museum der Moderne Salzburg
Striking contemporary clifftop museum in marble & glass, home to 20th- & 21st-century visual art.
Two hundred feet above Salzburg’s old town, the Museum der Moderne Salzburg’s home perched on Mönchsberg hill boasts panoramic views of the city and its surroundings. Skylights illuminate the soaring central staircase with its clearly defined formal language and austere aesthetic—exposed concrete walls are the dominant element.
Gasherbrum I (8080 M)
The Gasherbrum I (8080 m) (also known as Hidden Peak or K-5) is the 11th highest peak on Earth and the 3rd highest in Pakistan. Gasherbrum I am part of the Gasherbrum massif, located in the Karakorum region of the Himalayas. Gasherbrum means "Beautiful mountain". Gasherbrum I was designated K-5 T.G. Mojtgoeery in! 856 ghen he first spotted the peaks of the Karakorum daring the Great Trigonometric Survey of India. In 1892, William Maptin Conway provided the alternate name, Hidden Peak, in reference to its extreme remoteness. Gasherbrum I was first climbed on 5th July 1958 by an American expedition team.
View Detail www.takpaktour.com/Mountaineering/gasherbrum-i-8080-m
The trigonometry point on the tower here marks the highest point on Slieve Donard and the highest point in the whole of Northern Ireland. Fantastic views! This side of the tower and wall were covered with frost but the other side was clear.
For a photo story of my hike up Slieve Donard:
Berlin, Germany
{35 mm: ƒ/6.3 | 1/30 s | ISO 250 | manual White Balance | manual exposure | manual focus}
Trigonometry @2021 Limassol, Cyprus
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f/ 10 | 30 sec | ISO 100 | 130 mm
KASE Variable ND Filter 77mm
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Theme : Long Exposure Photography
Series : Harmony Within
Location: Limassol, Cyprus
Website: etilavgis.com
Instagram : www.instagram.com/estjustphoto/
Flickr : flickr.com/photos/estjustphoto/
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Gasherbrum is a remote group of peaks located at the northeastern end of the Baltoro Glacier in the Karakoram range of the Himalaya on the border of the Chinese-administered Shaksgam Valley and the Gilgit-Baltistan territory of Pakistan. The massif contains three of the world's 8,000 metre peaks (if one includes Broad Peak). Gasherbrum is often claimed to mean "Shining Wall", presumably a reference to the highly visible face of Gasherbrum IV; but in fact it comes from "rgasha" (beautiful) + "brum" (mountain) in Balti, hence it actually means "beautiful mountain".
In 1856, Thomas George Montgomerie, a British Royal Engineers lieutenant and a member of the Great Trigonometric Survey of India, sighted a group of high peaks in the Karakoram from more than 200 km away. He named five of these peaks K1, K2, K3, K4 and K5 where the K denotes Karakoram. Today, K1 is known as Masherbrum, K3 as Broad Peak, K4 as Gasherbrum II and K5 as Gasherbrum I. Only K2, the second highest mountain in the world, has kept Montgomerie's name.
Table Mountain is a flat-topped mountain forming a prominent landmark overlooking the city of Cape Town in South Africa. It is a significant tourist attraction, with many visitors using the cableway or hiking to the top. Table Mountain National Park is the most visited national park in South Africa, attracting 4.2 million people every year for various activities. The mountain has 8,200 plant species, of which around 80% are fynbos, meaning fine bush. It forms part of the Table Mountain National Park, and part of the lands formerly ranged by Khoe-speaking clans, such as the !Uriǁʼaes (the "High Clan"). It is home to a large array of mostly endemic fauna and flora. Its top elevates about 1.000 m above the surrounding city, making the popular hike upwards on a large variety of different, often steep and rocky pathways a serious mountain tour which requires fitness, preparation and hiking equipment.
The main feature of Table Mountain is the level plateau approximately three kilometres from side to side, edged by steep cliffs. The plateau, flanked by Devil's Peak to the east and by Lion's Head to the west, forms a dramatic backdrop to Cape Town. This broad sweep of mountainous heights, together with Signal Hill, forms the natural amphitheatre of the City Bowl and Table Bay harbour. The highest point on Table Mountain is towards the eastern end of the plateau and is marked by Maclear's Beacon, a stone cairn built in 1865 by Sir Thomas Maclear for trigonometrical survey. It is 1,086 metres above sea level, and about 19 metres higher than the cable station at the western end of the plateau.
The cliffs of the main plateau are split by Platteklip Gorge ("Flat Stone Gorge"), which provides an easy and direct ascent to the summit and was the route taken by António de Saldanha on the first recorded ascent of the mountain in 1503.
The flat top of the mountain is often covered by orographic clouds, formed when a southeasterly wind is directed up the mountain's slopes into colder air, where the moisture condenses to form the so-called "table cloth" of cloud. Legend attributes this phenomenon to a smoking contest between the Devil and a local pirate called Van Hunks. When the table cloth is seen, it symbolizes the contest.
Table Mountain is at the northern end of a sandstone mountain range that forms the spine of the Cape Peninsula that terminates approximately 50 kilometres to the south at the Cape of Good Hope and Cape Point. Immediately to the south of Table Mountain is a rugged "plateau" at a somewhat lower elevation than the Table Mountain Plateau, called the "Back Table". The "Back Table" extends southwards for approximately 6 km to the Constantia Nek-Hout Bay valley. The Atlantic side of the Back Table is known as the Twelve Apostles, which extends from Kloof Nek (the saddle between Table Mountain and Lion's Head) to Hout Bay. The eastern side of this portion of the Peninsula's mountain chain, extending from Devil's Peak, the eastern side of Table Mountain (Erica and Fernwood Buttresses), and the Back Table to Constantia Nek, does not have a single name, as on the western side. It is better known by the names of the conservation areas on its lower slopes: Groote Schuur Estate, Newlands Forest, Kirstenbosch Botanical Gardens, Cecilia Park, and Constantia Nek.
Back to the internal combustion engine, and Freightliner Shed 66954 completes the triangle at Mount Pleasant as it heads north to The Midlands with the 08.56 Millbrook FLT - Birmingham Lawley St (4M55) containers.
Enjoy the splendid SR footbridge while it lasts, patina and all. Rail-traffic over the level crossing is so intense that the barriers are down more than up during daylight hours, hence there are plans to replace it with a road over-bridge - probably much to the relief of motorists and mothers with pushchairs alike.
18th June 2015
© M J Turner Photography
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The spectacular summer solstice sunset viewed from the summit of High Seat on the longest day of the year. I really like the summit outcrop of this hill, topped with an Ordnance Survey column. These structures, often known as trig points, are generally placed on the highest point of a certain area and were used to map out Britain as they aid in geodetic surveying. I read that the nearby Armboth Fell is the most central summit in the Lake District, so I’m assuming this is the most central trig point in the National Park as it’s the closest one to that point.
High Seat is quite unique because, despite being just shy of 2000ft in altitude and the fact that there’s many higher hills in the Lake District, this summit is the highest point for 5 miles in all directions due to the fact that the central upland area of the National Park is actually lower than the surrounding mountains. Therefore, the top affords an amazing 360 degree panorama of many of the highest mountains in the country including, pictured here, Bowfell, Scafell Pike, Great Gable and Pillar. To the north-west, there is a gap between the mountains of Grisedale Pike & Skiddaw which provides distant views to Scotland on a clear day, and at this time of year this is the direction where the sun sets – therefore I was rewarded with this stunning light as the sun dipped over the distant horizon.
Back in the days, when advanced calculations had to be made, one didn't rely on an artificial but rather on real intelligence to get the correct answer.
No need for an internet connection. This was a time where the phones weren't smart but merely used to... talk to each other. Heck, even the pocket calculators didn't exist yet!
And yet, by sliding discs, turning dials and aligning arrows and numbers, one could calculate pretty accurately trigonometric functions, exponentials and logarithms, powers...
Ironically, I'm sure that some of the viewers of this picture will ask Chat GPT how a circular sliding disc works! Going full circle.
Kangchenjunga is the third highest mountain in the world which also known as Sleeping Buddha. Its summit lies at 8,586 m (28,169 ft) in a section of the Himalayas.
Sandakphu or Sandakpur (3636 m; 11,930 ft) is a mountain peak in the Singalila Ridge on the border between India and Nepal. It is the highest point of the ridge and of the state of West Bengal, India.
"It's not easy for me to talk about
I have heavy heartstrings
I'm not simple, it's trigonometry
It's hard to express
I can't explain"
To become a ship's captain you have to be a skilled mathematician, also competent in physics and many other skills. In my own time training as a Second Officer in the Merchant Navy I came to admire the professionalism of those Masters, "Old Men" as they were respectfully called. I was surprised how many I encountered who were raised in the Highlands and Islands, from tiny islands like Barra, wondering how they could attain such education standards in the 'simple' communities on the fringe of the Scottish Islands.
Entering the Ardnamurchan lighthouse stables I saw an interesting face. In fact I was more drawn to the significance of his blazer and cap badges that seemed vaguely familiar to me. Perhaps it has been so long but I should have recognised the Merchant Navy style I first stitched to my own uniform 45 years ago. But this gentleman turned out to have been a Captain, a Master Mariner, no less, serving 45 years at sea himself from the age of 16 and now retired for 30 years. Captain Peterson of the Ben Line was one of seven Master Mariners to be produced by just one family. That's some massive achievement, easily recognised by someone like me who only attained the training level of Second Officer. We chatted over old times pre-computerisation and satnav and days of astro-navigation, sun and star sights, spherical trigonometry, log haversines and sextants and the feeling ancient mariners get when they step on board for one last trip.
I just had to ask him for a casual portrait snap in the dim light inside the lighthouse.
Timelapse video: youtu.be/gD1cJzsTHMo
Since 2019, I've had the idea of photographing a moonbow on Yosemite Falls while a hiker created a light trail up the trail next to it. My first attempt at this shot was canceled by the pandemic, and then the next few years were too dry for good moonbows. This year's record snowpack finally enabled this photo.
I wrote a Python code to predict where and when rainbows and moonbows could be possible. This involved some fun spherical trigonometry and vector math that I hadn't needed in a while. I was worried that I might have made an error and a whole group of people might make a trip based upon my erroneous predictions. Fortunately, my predictions were accurate, the moonbow appeared right on schedule, and it lasted about 20 minutes when viewed from Sentinel Dome.
Jon-Kyle Mohr and I carried six cameras up to Sentinel Dome, across the valley from Yosemite Falls. Griff Joyce and Mark Vierra, of the Half Dome 50/50/50 adventure and the Yosemite lunar eclipse trip, hiked up Yosemite Falls at the right time. An 82% moon illuminated the scene.
Clouds obscured the sky above, blocking the moon, and filled the valley, blocking my view of the falls. Following some desperate prayers, they cleared exactly as the moonbow occurred. The photo was possible after all!
This is the first of several posts I'll make, since I have a number of angles and variations on this photo. I stacked a bunch of 25-second exposures to produce the light trail. A single exposure was used for the moonbow.
At Rawnsley Bluff there is a dry stone survey cairn, constructed by Samuel Parry in 1858 as a trigonometrical survey marker.
Rawnsley Bluff was named after H.C. Rawnsley who falsely presented himself as a surveyor to the Governor of South Australia in 1850. Within three months he was found to be incompetent and discharged.
www.walkingsa.org.au/walk/find-a-place-to-walk/rawnsley-b...
1940s (?) Keuffel & Esser (K&E) 4080-3 Log Log Duplex Trig slide rule. Before small, affordable electronic scientific calculators became popular in the 1970s, the slide rule was the workhorse of engineers and scientists everywhere.
For this picture, I set the cursor to the 2.25 mark on the A scale. The cursor position corresponds to 1.5 on the D scale, which equals the square root of 2.25. 1.5 is also the cube root of 3.375, the location of the cursor on the K scale.
Timelapse video: www.youtube.com/watch?v=gD1cJzsTHMo
Since 2019, I've had the idea of photographing a moonbow on Yosemite Falls while a hiker created a light trail up the trail next to it. My first attempt at this shot was canceled by the pandemic, and then the next few years were too dry for good moonbows. This year's record snowpack finally enabled this photo.
I wrote a Python code to predict where and when rainbows and moonbows could be possible. This involved some fun spherical trigonometry and vector math that I hadn't needed in a while. I was worried that I might have made an error and a whole group of people might make a trip based upon my erroneous predictions. Fortunately, my predictions were accurate, the moonbow appeared right on schedule, and it lasted about 20 minutes when viewed from Sentinel Dome.
Jon-Kyle Mohr and I carried six cameras up to Sentinel Dome, across the valley from Yosemite Falls. Griff Joyce and Mark Vierra, of the Half Dome 50/50/50 adventure and the Yosemite lunar eclipse trip, hiked up Yosemite Falls at the right time. An 82% moon illuminated the scene.
Clouds obscured the sky above, blocking the moon, and filled the valley, blocking my view of the falls. Following some desperate prayers, they cleared exactly as the moonbow occurred. The photo was possible after all!
I stacked a bunch of 30-second exposures to produce the light trail. A single exposure was used for the moonbow.
Timelapse video: youtu.be/gD1cJzsTHMo
Since 2019, I've had the idea of photographing a moonbow on Yosemite Falls while a hiker created a light trail up the trail next to it. My first attempt at this shot was canceled by the pandemic, and then the next few years were too dry for good moonbows. This year's record snowpack finally enabled this photo.
I wrote a Python code to predict where and when rainbows and moonbows could be possible. This involved some fun spherical trigonometry and vector math that I hadn't needed in a while. I was worried that I might have made an error and a whole group of people might make a trip based upon my erroneous predictions. Fortunately, my predictions were accurate, the moonbow appeared right on schedule, and it lasted about 20 minutes when viewed from Sentinel Dome. From this photo's location on the cliff above Yosemite Falls Trail, the moonbow lasted about an hour.
This photo was taken a couple nights earlier than my other moonbow photos. This was actually a test photo made possible by some rock climbers who fortuitously hiked down at night. I intended to shoot this angle with Griff and Mark on the trail simultaneously with my other moonbow photos. This camera spot is way off the trail, and basically no one visits it, so I placed a camera on the cliff with a note stating I would return and begging anyone who found it to not steal it. Unfortunately, I got quite unlucky, and some random off-trail backpackers found the camera. They didn't steal the camera, but they did move it and disable my timer. As a result, it did not collect the photos I wanted during the main moonbow shoot. On the other hand, the test shot came out well enough, and it resulted in this.
A bunch of 30-second exposures were stacked to produce the light trails in this image. A single one was used for the moonbow.
The slide rule, also known colloquially in the United States as a slipstick, is a mechanical analog computer. As graphical analog calculators, slide rules are closely related to nomograms, but the former are used for general calculations, whereas the latter are used for application-specific computations.
The slide rule is used primarily for multiplication and division, and also for functions such as exponents, roots, logarithms, and trigonometry, but typically not for addition or subtraction. Though similar in name and appearance to a standard ruler, the slide rule is not meant to be used for measuring length or drawing straight lines.
Slide rules exist in a diverse range of styles and generally appear in a linear or circular form with a standardized set of markings (scales) essential to performing mathematical computations. Slide rules manufactured for specialized fields such as aviation or finance typically feature additional scales that aid in calculations particular to those fields.
At its simplest, each number to be multiplied is represented by a length on a sliding ruler. As the rulers each have a logarithmic scale, it is possible to align them to read the sum of the logarithms, and hence calculate the product of the two numbers.
The Reverend William Oughtred and others developed the slide rule in the 17th century based on the emerging work on logarithms by John Napier. Before the advent of the electronic calculator, it was the most commonly used calculation tool in science and engineering. The use of slide rules continued to grow through the 1950s and 1960s even as computers were being gradually introduced; but around 1974 the handheld electronic scientific calculator made them largely obsolete and most suppliers left the business.