# Draw Longitude Lines of a Sphere on a Circle

• Comp Sci
• Bking592
In summary, the purpose of drawing longitude lines of a sphere on a circle is to represent the curved surface of the Earth on a flat map, making it easier to navigate and measure distances accurately. These lines are drawn by dividing the sphere into equal halves along the equator and extending perpendicular lines from the Prime Meridian (0 degrees longitude) to the North and South poles. There are a total of 360 longitude lines on a sphere, with each line representing one degree of longitude. The Prime Meridian serves as the starting point for drawing these lines and is used as a reference point for measuring east-west distances on the Earth's surface. However, these lines are not evenly spaced due to the curvature of the Earth's surface, with lines appearing
Bking592
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
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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.

## 1. What are longitude lines on a sphere?

Longitude lines on a sphere are imaginary lines that run from the North Pole to the South Pole, intersecting at the equator. They are used to determine the east-west position of a point on the surface of the sphere.

## 2. How are longitude lines drawn on a circle?

In order to draw longitude lines on a circle, you will need to first determine the center point of the circle. Then, using a compass, draw a circle with the desired radius. Next, use a protractor to measure and mark the angles for the longitude lines on the circle. Finally, connect the marks to create the longitude lines.

## 3. What is the purpose of drawing longitude lines on a circle?

The purpose of drawing longitude lines on a circle is to represent the spherical shape of the Earth on a two-dimensional map. This allows for more accurate navigation and location determination.

## 4. How many longitude lines are there on a sphere?

There are an infinite number of longitude lines on a sphere. However, for the purpose of mapping and navigation, the Earth is typically divided into 360 degrees of longitude, with each degree being further divided into minutes and seconds.

## 5. Do longitude lines on a sphere intersect at the poles?

Yes, longitude lines on a sphere intersect at the poles, which are the points where the Earth's axis of rotation meets the surface. This is because longitude lines run from the North Pole to the South Pole, passing through both points.

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