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21

They identify the size of the formation. That Free French unit you referred to with one X is actually a brigade, not a division. Similarly, the Greek and German unit facing each other German unit both have a single X, and has been explicitly labelled as brigades. All other units, including the Italian one you mentioned, have XX - indicating they are ...


12

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 ...


11

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 ...


8

Here's a zoomed-in screenshot of a map I made using Harvard's Geospatial Library. As you can see in the left, the layer I chose was "Germany State Boundaries, 1914." The little exclave in the bottom center of the screen is Achberg. If you zoom in a little more, it is labeled, but I chose to stay a little further out so you could see the other exclaves. ...


7

Harvard possesses one of the United State's largest collection of maps. Recently, they have been working on digitizing the collection. People who know how to use this kind of stuff can probably do a lot with the online Geospatial Library. I went to a presentation given by Harvard's GIS team. If I ever find my notes, I'll expand this answer with the other ...


5

Actually, I've found one already answered question, that gives some info on what I'm trying to find. Good online sources for historical maps Useful links from there are (sorted by usefulness): http://www.oldmapsonline.org/ http://www.euratlas.net/antique/cartography/index.html http://www.lib.utexas.edu/maps/historical/ http://www.davidrumsey.com/ ...


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:


4

They symbolize the sizes of units (so if the flag represent a division with 10,000 people or an army with 200,000) On smaller maps you may also see dots or lines. .-squad ..-platoon I-Company II-Battalion III-Regiment X-Brigade XX-Division XXX-Corp XXXX-Army XXXXX-Army Group XXXXXX-Theather


3

National Geographic is generally considered the premier map maker since the inception of the society over a hundred years ago. The National Geographic 1970 World Map probably answers your question of "What was the most accurate map of the Earth before satellites?" Note that the premise of your question may be off kilter. In most cases it is not the accuracy ...


3

I've found this wikipedia page, which is precisely the list of "things I have to check" for this investigation. It allowed me to raise the lower bound to be definitely 1984, and I doubt we can then get more precise than 1984-1990. Still, maybe I missed something, so better answers are welcome. Useful data Ouagadougou's nation is called Burkina (yes, they ...


2

Its possible I can narrow it down further, due to there being no red box in the Pacific for the Trust Territory of the Pacific Islands. That puts it at 1986 or later.


1

There is a detailed administrative map of the German Empire on Wikimedia, and most small exclaves, such as Achberg, are visible, and their colour helps to see exclaves of which state they are. It is possible some of the smaller exclaves (smaller than a village) are not directly visible, but combined by Two Shed's answer, it should be possible to make an ...


1

The kind of software you are trying to make exists: http://www.clockwk.com/ It is quite convenient and detailed, and covers the period for which sufficient data are available. But it is not free. EDIT. To address some concerns expressed in comments. This is the web page of the person who made this software. I know him personally and the page is around for ...



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