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Why is longitude measured in non-parallel lines coming from the poles instead of in parallel circles emanating from the Prime Meridian and IDL?

Dr. Aris Thorne
Dr. Aris Thorne
Senior Science Editor · Mar 16, 2026 · Updated Apr 13, 2026

One of these ways is really easy and convenient for plotting a map and navigating. The other is really, really, really annoying. If you plotted the parallel circles on a flat map, you would get two sets of either concentric ellipses or circles depending on the projection you use, and you couldn't…

64
Words

1 min
Read Time

#229
of 500 in General Knowledge

-6%
vs Category Avg

The Short Answer

One of these ways is really easy and convenient for plotting a map and navigating. The other is really, really, really annoying. If you plotted the parallel circles on a flat map, you would get two sets of either concentric ellipses or circles depending on the projection you use, and you couldn't keep your East/West coordinates fixed if you traveled due North/South.

Analysis

Key Concepts: Circles, ways, easy

This explanation focuses on circles, ways, easy and spans 64 words across 3 sentences. The depth is typical for General Knowledge questions (category average: 68 words), striking a balance between accessibility and completeness.

What This Answer Covers

The explanation opens with: “One of these ways is really easy and convenient for plotting a map and navigating.” It then elaboratesultimately building toward a complete picture across 3 connected points.

How This Compares in General Knowledge

Ranked #229 of 500 General Knowledge questions by answer depth (top 47%). This falls in the detailed tier — above average depth. The explanation goes beyond surface-level but keeps things accessible.

Frequently Asked Questions

Is there a simple explanation for why longitude measured in non-parallel lines coming from the poles instead of in parallel circles emanating from the prime meridian and idl?

One of these ways is really easy and convenient for plotting a map and navigating. The other is really, really, really annoying. If you plotted the parallel circles on a flat map, you would get two sets of either concentric ellipses or circles…

How detailed is this explanation compared to similar General Knowledge questions?

This is an above-average answer at 64 words, ranked #229 of 500 General Knowledge questions by depth. The key concepts covered are circles, ways, easy.

What approach does this answer take to explain longitude measured in non-parallel lines coming from the pol?

The explanation uses direct explanation across 64 words. It is categorized under General Knowledge and addresses the question through 1 analytical lens.