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The Prime Meridian we use now was the one the British chose, since it went through Greenwich Observatory near London. France had their own where Paris was 0 degrees, the US had one. When the situation of each nation having its own longitude got too annoying, they picked one. England's won out because of 2 factors: 1) England was the largest power at the ...


13

The book "Longitude" discusses this, and says the international standardization of the prime meridian arose mainly due to the publication of practical astronomical tables which used the Greenwich meridian. As ships started using these tables for navigation (as opposed to dead reckoning), they naturally switched to using the Greenwich meridian if they hadn't ...


8

The first satellite image of Earth was taken in 1959. At that time, as far as I can tell, aerial photography and stereoplotters were used to produce topographic maps with accuracy that I imagine would have depended mostly on the quality of the aerial photographs, but probably down to a few meters. For larger maps depicting the Earth, I think the answer ...


7

The maps were almost as accurate as they are after the launch of satellites. And this has little to do with air photography. And celestial navigation ("sextants" hinted in the previous message) was responsible only for mapping of remote islands. The main method of making accurate maps was geodesic survey. One begins with laying a base, that is measure ...


5

Although Euclid is renowned for his compilation of the axioms and theorems of plane geometry, most if not all of this material had been known for centuries. With these mathematical tools, and the use of strings and simple pedometers and protractors, remarkably accurate maps could be drawn by the ancients for territories that were relatively level and ...


5

The Wikipedia page on the British Official History of the Great War. A lot of the volumes are available as PDFs in various web archives. For example, this map, in the chapter on First Contact with the Enemy is extracted from a volume freely available:


2

You could check Wikipedia In the immediate post-World War One period, Skalat was seized by local Ukrainian activists, who declared that the town was part of West Ukrainian People's Republic. Polish - Ukrainian tension escalated, and climaxed in the Polish–Ukrainian War. On April 23, 1919, Ukrainian activists murdered a popular Roman Catholic parish ...


1

The choice of the Greenwich Meridian (for the 0 degree longitude) was arrived at during a time when Britain was the primary naval power and London was the "center" of the world. It is fortunate at the 180 degree line (relative to the Greenwich Meridian) mostly ran through the Pacific Ocean. That made it convenient to have much the international date line ...



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