Wrap a world map image onto a sphere

Wrap a world map image onto a sphere

garywatson00
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Wrap a world map image onto a sphere

garywatson00
Contributor
Contributor

I have successfully wrapped a map onto a sphere, as shown in the attached image, but now can't seem to repeat the process. It was trial and error the first time but it worked, now I can only fill the Northern hemisphere. Can anyone show what steps are missing?

 

The file and the image are included.

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Message 2 of 5

Drewpan
Advisor
Advisor

Hi,

 

I am surprised that you got a rectangular map to do that on a sphere at all, let alone

get it accurately. One of the reasons that there are so many different Projections of

Flat Maps is the difficulties with distortion, particularly around the edges. They do

not often replicate the same as what is on the equivalent sphere.

 

A Decal "should" drape and wrap around the shape that you put it onto so if you managed

to get an accurate end result then you either measured and placed extremely carefully or

you managed to fluke it. It is a shame that a Decal must be a flat surface with no cut outs

as there is one Projection that literally peels off the surface of the sphere but leaves huge

gaps in the end result at the top and bottom. I cannot remember what it called but it shows

the surface with accurate size so Africa is the Enormous sized Continent it actually is and

not the usual projection that distorts it to make Europe bigger. It just isn't terribly useful

for practical purposes like plotting onto anywhere except the middle. To give you an example

of distortion of maps, most of Europe actually fits pretty much on the Australian East Coast

to the NT and SA Border. Roughly equivalent from the US East Coast to the Mississippi River.

Australia and the US Mainland (not Alaska) are almost exactly the same size.

 

I have only just returned home and not had time to look at your file but will have a look

tomorrow (it is Late in Australia right now). I suppose that the wrinkles from the distortion

of a flat map cancel each other out when fusion calculates what it would look like on a sphere.

 

Cheers

 

Andrew

Message 3 of 5

garywatson00
Contributor
Contributor
I used YouTube to get the methodology and the key was to have a map that was 2X wide and 1X high since the distance from the North Pole to the South Pole is 1/2 the circumference of the Earth. After a bunch of failures, I was finally able to set the width and height values in the dialog: "Appearance/Edit/Advanced/Edit Image". I set the width at twice the height and it eventually worked. Now it is crazy looking and the image I supplied is the best I could achieve.
 
I went on to create a globe of 400 mm (15.75 in) diameter as shown in the attached picture. Now I'm trying to document the process and am stuck on this mapping issue.
 
Thanks for any help you can give!
 
Gary Watson
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TheCADWhisperer
Consultant
Consultant

@garywatson00 wrote:
I used YouTube to get the methodology ...

@garywatson00 

Cite your reference url.

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Message 5 of 5

garywatson00
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Contributor
Accepted solution

I think I solved the problem.

The URL is https://www.youtube.com/watch?v=Xf0zy7AdNIU

The missing step was to first select the texture map under body/properties and then select the Z axis for the direction of the image.

I've included a revised .f3d file with the proper map. This is the result after embossing the map onto the 32 facets of polygons, routing the 3D surface and gluing the whole thing together.

IMG_9828.JPG

If you are interested in a blow by blow of the mapping process, I can supply one.

 

Thanks for your interest.