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I'd just like to hijack this thread to post one of my all time favourite websites:
https://maps.nls.uk/geo/explore/side-by-side/swipe/
It's the National Library of Scotland's map site's side-by-side viewer which lets you browse classic maps synced with modern ones. UK-centric, but it still has loads of global and international maps too.
Might I suggest this article about French mapmaking in the 1600s. Supposedly in response to a map commissioned by King Louis XIV at the time, which shower France about 20% smaller than originally mapped, the King replied:
"Your work has cost me a large part of my state!"
The Cassini map is browsable online on https://www.geoportail.gouv.fr/
You can do layers and compare with more modern maps. The accuracy is quite stunning if you know how they made it.
The map overlay on that website is stunning. I don't know much French, but I managed to get it to overlay the IGN map (I presume the currently accepted map from the government mapping agency) on the Cassini map, both at 50% opacity, and it's truly remarkable how good the latter must have been in its time.
There's so much detail along the coast that was faithfully recorded. The only thing I can spot that is noticeably different would be the river runs, but that's entirely expected since rivers naturally move around.
I'd love to know if there's a USA website that overlays colonial-era maps atop the modern USGS maps.
Lots of replies about triangulation etc but the basic concept if a top down map was a military development by - Gallileo. That guy did so much
At first, people used itinirary (to go to Rome, first go to PlaceX, then PlaceY, etc)
Maps of the time, when they existed, where merely illustrations, with fictionnal places sprinkled in.
Then some attempts mesured distances between places by counting step, and overall direction. This is why most maps before 1000ce are really strange looking, but you can guess what they represent using the name of places.
With the invention of things like the astrolab, people where able to mesure both distances and more precise direction, giving birth to triangulation, which was used until the invention of GPS
Everything was/is mapped with trigonometry. You map the big triangles first, then once you have some nice big markers at known distances in the hills around you you can just measure angles to work out where you are. Repeat that lots and you can record the exact location of everything.
Yep and in the UK os maps still have many of the trig points on them. Sometimes there are actual markers on the ground as well.
A lot of others have already mentioned the use of trigonometry. I would like to add that, often times, the position of the Sun, stars, etc. were used for navigation. I would imagine their positions would be useful to judge large distances. And many times, map makers asked those living in the area about regions they themselves have not explored in great detail. Lots of maps are also an amalgamation of many other maps, so although it is unlikely one person explored vast swaths of forest by themselves, it is more likely that different parts of it came from different people, including locals.
p.s. Eratosthenes, an ancient Greek polymath from 200 BCE ish (!!), measured the circumference of the Earth to a remarkable accuracy simply by using shadows of a vertical rod cast by the Sun. It's kind of insane how people were able to do all this without the assistance of modern technology.
Your question is not stupid, but it is overly vague and broad. An equally vague and broad answer would be: "They did their best with the tools and knowledge they had, tried to copy other cartographer's work (and failing that, their techniques), and otherwise just guessed. Failingthat, they made it up in ways that would benefit themselves the most.
Source: I read the Map Men's book not too long ago.
There is nothing broad about their questions, it's literally a straightforward and to the point question. Though not stupid.
Er, not really... for instance:
"...back in the day?"
Which 'day'? Before digital mapping? Before cartography as a formal practice? Before the invention of the compass? Before the standardization of the meter? Before the printing press? Before Galileo? Before Eratosthenes?
The time period of the question is potentially the entirety of human history. That's quite broad.
What methods were used to scale down in world, to paper distances?
In which part of the world? In which culture? For what purpose? (e.g. navigation? coastal, inland, international? crop planting? city planning? determining property lines? etc)
This is not a straightforward question in any way. A complete answer would be an undergraduate degree with a double major in history and geography.
Oh fuck off mate, anything "back in the day" just means before tech, if you wanna pick a specific timeline, go for it, but thats cause you wanna talk about a specific timeline. You can answer the question through any pre-google maps timeline and no one would question you for shit, this isnt your prof. history class, it's some dude that prolly just had a wank and mid post nut clarity went "how the fuck did me great granddaddy get around the country?"
As for methods, same basic concept as my first question, answer with whatever knowledge you have, but mapping, 95% of the time, would mean how to get from your house to your local Trader Joe's.
Please step down from your high horse.
"Before tech" and "great granddaddy" and "local Trader Joe's" are 3 different time periods. Sure they could've just chosen one, but it might not be what OP was curious about.
An individual who's curious enough to ask the question would probably be curious enough to further drill down to a specific time period that they're curious about. This could have led into good discussion.
If you want something that just tells you an answer and doesn't question you or ask you to clarify, then you can use an LLM. If you want conversation, you can use Lemmy.
My brother in christ, maybe asking a broad question shows his lack of knowledge...yk what also helps to create new knowledge as a noob? Asking fucking questions and having people teach you, you twat.
Why are you being this way? Are you usually like this?
With idiots, yes.
Um... but you said:
"There is nothing broad about their questions"
Okay i understand what you mean, when I said that I meant it in a way, their question isnt broad in a negative way, it's broad in a very normal question type of way, so you can't blame him for asking a normal question, it may be broad to an expert, but if he was an expert he would be answering, not asking.
Lmao. "When I said broad, I didn't mean broad, I meant notmal". And you go around calling other people idiots...
Normal people broad, not stupid person broad, and I don't call other people idiots, just you.
step 1. you take a piece of paper
step 2. you paint a picture of what you think the landscape looks like from above
step 3. you add names and descriptions to all the small icons that you just drawed