The comes attached to or surrounded by a hardcover, and it’s a bit like a puzzle to open it up without tearing it. Thankfully, we were successful in opening and returning the map to its original state in which it looks like a thin book.
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tomadmin
(@tomadmin)
Mar 16 2025
0.57
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The whole process is fun. Mina and Victoria lead the team and do a great job of getting high-quality images of all the maps and documents and history books that we shoot on a regular basis.
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No dots yet
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tomadmin
(@tomadmin)
Mar 16 2025
0.53
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We shot the in images, I believe. We then had those four images stitched together in post processing using Photoshop.
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tomadmin
(@tomadmin)
Mar 16 2025
0.3
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This is an amazing map of Shanghai and the surrounding archipelago that was lent to me by Pam and Brewer Stone. They bought it when they were in Shanghai several decades ago. The map itself was made by the British Hydrographic Office in 1916.
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tomadmin
(@tomadmin)
Mar 16 2025
0.47
0.21
The map is really big. I estimate about 4‘ x 3‘.
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Dot stories
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tomadmin
(@tomadmin)
Mar 14 2025
0.31
0.3
Shanghai in 1916. This map was first made by the British in 1883 and was used for navigational purposes.
Transcription | Voice Note [2025-03-14 13:43] ---------------------- Shanghai in 1917. This map was first made by the British in 1883. You can see at the bottom of the map, the dates and was used for navigational purposes. And my thanks to Pam and Brewer Stone for lending this map. Ah, ah, to us to shoot.
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tomadmin
(@tomadmin)
Mar 14 2025
0.36
0.33
Pu Tung is what is now called Pudong
Transcription | Voice Note [2025-03-14 13:44] ---------------------- Putong on the map is what is now called Pudong.
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tomadmin
(@tomadmin)
Mar 14 2025
0.43
0.26
Not sure exactly what the orange marks are for in the map.
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tomadmin
(@tomadmin)
Mar 14 2025
0.64
0.31
Amherst rocks! Good grief! Where are the Williams rocks?
Transcription | Voice Note [2025-03-14 13:45] ---------------------- Amherst rocks. Crieff, what are, what, where are the Williams rocks? Come on.
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tomadmin
(@tomadmin)
Mar 14 2025
0.44
0.44
Lots of interesting things around this DOT, including:
numerous hamlets
Grave mounds
Sounding (depth) figures, in fathoms, I believe (one fathom equals 2 yards or 6 feet - Wikipedia)
Speed recommendations
Transcription | Voice Note [2025-03-14 13:46] ---------------------- There's lots of interesting things around this dot you can see. Up above numerous hamlets and then above into the left grave mounds. The soundings or numbers in the water area are soundings that's depth in fathoms, I believe, and one fathom equals 6 ft. So not very deep and then also to the right and down a little bit from the dot is some speed recommendations.
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tomadmin
(@tomadmin)
Mar 14 2025
0.83
0.21
Soundings in fathoms, which means the numbers all over the water portion of the map are in 6 foot increments. Wikipedia
Elevation shown by an early method of hill-shading (relief shading), later utilized by James Niehues on ski maps. Wikipedia
Historic and antique maps used a variety of methods to depict elevation and terrain. These techniques evolved over time, reflecting advancements in cartography and surveying. Below are some of the most notable methods:
1. Hachures
Hachures are short lines drawn in the direction of the steepest slope, with their density and thickness indicating the steepness of terrain. This method was common in the 18th and early 19th centuries but lacked precision compared to later techniques7.
While intuitive for visualizing slopes, hachures were less scientifically accurate and more artistic7.
2. Contour Lines
Contour lines connect points of equal elevation and became a standard method for representing terrain starting in the 18th century, gaining widespread use in the late 19th century17.
These lines are spaced closer together for steep slopes and farther apart for gentle slopes, providing a precise representation of elevation changes111.
Early contour maps were created through field surveys using tools like plane tables and alidades, later replaced by photogrammetry410.
3. Hypsometric Tinting (Elevation Coloring)
This method uses color gradients to represent elevation ranges, with green for lowlands, brown for mid-elevations, and white for high mountains9.
It provides an intuitive visual reference but is less detailed than contour lines. This technique predates modern mapping technologies and may have originated with Leonardo da Vinci's work7.
4. Relief Shading
Relief shading simulates light and shadow to give a three-dimensional appearance to terrain. Light typically comes from the northwest to create depth perception9.
This artistic method was often combined with other techniques like contour lines or hachures to enhance map readability.
5. Spot Heights
Spot heights indicate specific elevation points on a map, often labeled with their exact altitude. These were used alongside other methods like hachures or contours to provide precise data2.
6. Pictorial Representations
Early maps often used pictorial symbols, such as drawings of mountains or hills, to represent elevation. These were more artistic than scientific and lacked spatial accuracy15.
7. Field Sketching
Before photogrammetry, surveyors manually sketched terrain features based on measurements taken with tools like aneroid barometers or plane tables. These sketches were later refined into contour maps4.
8. Photogrammetry
Introduced in the late 19th century, photogrammetry revolutionized elevation mapping by using stereo photographs to determine elevations accurately. This method became standard by the 1930s10.
These methods showcase the evolution of cartographic techniques from artistic representations to precise scientific tools for depicting elevation on maps.
Transcription | Voice Note [2025-03-14 13:47] ---------------------- The way that they show elevation on this map is very interesting. Um, I believe this is sort of an early use of hill shading, which was later utilized by James Niehaus on ski maps. Uh, Uh, it's, it's, um, it's interesting, wonderfully done.
The British Hydrographic Office, established in 1795 by King George III, has a rich history of producing nautical charts and maps15. Initially created to support the Royal Navy, it began selling charts to the public in 182116. The office's first Hydrographer was Alexander Dalrymple, followed by Captain Thomas Hurd, who expanded its operations and chart production16.
Under Rear Admiral Francis Beaufort's leadership from 1829 to 1854, the office significantly increased its chart-making capabilities, producing nearly 1,500 new charts4. By 1855, their catalog listed 1,981 charts4. The office continued to grow, becoming the world's largest establishment of its kind by 19147.
In 1916, during World War I, the Hydrographic Office would have been under intense pressure to provide accurate charts for naval operations1. The office had already been producing charts of China's coastal waters, including the area around Shanghai, for decades8. These charts were crucial for navigation and military planning in the region.
The 1916 chart of Shanghai's harbor would have been based on earlier surveys, possibly updated with recent information from naval vessels or other sources. It would have included detailed soundings, navigational hazards, and other critical information for safe maritime operations in the area3.
This is the actual map number of dots on it. There’s that I put together that you can click through to explore the map further. Or you just zoom in on various things and see what you.
![[ 2025-03-14 13:11:04 ]](https://pxpbstrg.s3.us-west-1.amazonaws.com/images/thumbs/1741957873.jpeg)
![[ 2025-03-14 13:12:33 ]](https://pxpbstrg.s3.us-west-1.amazonaws.com/images/thumbs/1741957962.jpeg)
