Draw Longitude Lines of a Sphere on a Circle

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SUMMARY

This discussion focuses on drawing longitude lines of a sphere on a 2D circle, specifically addressing the challenges of representing these lines accurately. The Mercator projection is highlighted as a common method, with the acknowledgment that lines of longitude appear as half-ellipses in this representation. Participants emphasize the necessity of understanding how to draw ellipses to achieve the desired visual effect on the 2D globe.

PREREQUISITES
  • Understanding of Mercator projection
  • Basic knowledge of 2D graphics programming
  • Familiarity with ellipse drawing techniques
  • Concept of spherical geometry
NEXT STEPS
  • Research alternative map projections beyond Mercator
  • Learn techniques for drawing ellipses in graphic design software
  • Explore the mathematical principles of spherical geometry
  • Investigate the implementation of 2D graphics libraries for globe rendering
USEFUL FOR

This discussion is beneficial for graphic designers, cartographers, and developers involved in creating visual representations of geographical data, particularly those interested in map projections and 2D graphics techniques.

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Homework Statement
Find formula for putting curve to put longitude lines of the 2D circle
Relevant Equations
None
I'm trying to draw a 2D globe
 

Attachments

  • Latitude-and-Longitude-58b9d1f35f9b58af5ca889f1-3586327561.jpg
    Latitude-and-Longitude-58b9d1f35f9b58af5ca889f1-3586327561.jpg
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Welcome to PF.

What can you tell us about Mercator's projection? Are there any other projections that you could consider using?
 
The lines of longitude will look like half-ellipses on the face of the 2D globe.
You need to find out how to draw an ellipse.
 

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