Mollweide Map Projection and Newton's Method
Posted3 months agoActive3 months ago
johndcook.comResearchstory
calmneutral
Debate
20/100
CartographyMathematicsMap Projections
Key topics
Cartography
Mathematics
Map Projections
The article discusses the Mollweide map projection and its relation to Newton's method for solving equations, with commenters exploring the intricacies of the projection and potential improvements to the numerical methods used.
Snapshot generated from the HN discussion
Discussion Activity
Moderate engagementFirst comment
4d
Peak period
6
90-96h
Avg / period
6
Key moments
- 01Story posted
Sep 21, 2025 at 11:00 AM EDT
3 months ago
Step 01 - 02First comment
Sep 25, 2025 at 5:46 AM EDT
4d after posting
Step 02 - 03Peak activity
6 comments in 90-96h
Hottest window of the conversation
Step 03 - 04Latest activity
Sep 25, 2025 at 10:45 AM EDT
3 months ago
Step 04
Generating AI Summary...
Analyzing up to 500 comments to identify key contributors and discussion patterns
ID: 45323351Type: storyLast synced: 11/20/2025, 5:39:21 PM
Want the full context?
Jump to the original sources
Read the primary article or dive into the live Hacker News thread when you're ready.
That doesn't look like the image. If you're looking at Earth from a distance, there will be foreshortening that squishes the meridians together. But the meridians look almost evenly spaced except for the far left and right edges of the ellipse.
You may need some special handeling for sin(2t)=1 still. You could pretend the funtion continues there (just join it together with asin(z - 1) + z - 1 + pi/2). Or maybe some other transformation.