this post was submitted on 22 Feb 2025
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I have a clear globe that i would like to project to a flat map. Any common projection should work, since computer programs exist for converting map projections. Where should i start?

A couple of details: First, my "globe" is an empty plastic Christmas tree ornament, so it can be hung from a string at one end but it doesn't have a stand like a normal globe does.

Second, this is a worldbuilding thing. My globe does not represent any real planet or similar body, which is why i need to make a new map from the globe instead of finding an existing one.

EDIT: To be clear, i know about projections already. I'm not worried about picking a projection. What i'm asking about is the process is for taking a physical globe and projecting that globe's surface onto a flat rectangle. I don't know how to turn an imaginary cylinder or cone sitting on my globe into a tangible physical or digital map. I don't have the means to cut up and unfold my globe until it's flat. What is the actual process for making a map from a globe, for any projection? I know this isn't how maps are traditionally made, but surely there must be a good way to do this.

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[โ€“] Zotora 6 points 2 weeks ago* (last edited 2 weeks ago) (2 children)

Any projection is a compromise. You conserve some properties at the cost of others.

You could always start with a mercator projection. They are easy enough to make (think cylinder wrapped tightly around the 'equator' of your globe.

Or you could go with a conic projection (think cone sitting on a gloabe like a hat) which are also simple to make. Lambert conformal conics are common in aeronautical charts.

Both of these projections are used in different maps in the real world for navigation.

Edit: Go for a browse; there are plenty of different flavors https://en.m.wikipedia.org/wiki/List_of_map_projections If your using software, then you can kinda do whatever you want without worrying about how hard or easy it is to make. ๐Ÿ˜„

[โ€“] [email protected] 5 points 2 weeks ago (1 children)
[โ€“] Zotora 2 points 2 weeks ago* (last edited 2 weeks ago)

Not quite what i meant haha: A conic projection uses a 3D cone laid over the top of a 3D globe and then the cone is spread out on a flat surface, rather then the map itself being a cone as you have done above.

The videos below might help illustrate what i mean.

Some relevent Videos: