Contents

- 1 What is a contour map calculus?
- 2 How do you find the contour plot?
- 3 What are the 3 types of contour lines?
- 4 How do you find the slope of a contour map?
- 5 What are the 5 Rules of contour lines?
- 6 How do you calculate contouring?
- 7 How do you draw a contour line on a grid?
- 8 Can contour lines cross?
- 9 What is a contour map used for?

## What is a contour map calculus?

Contour maps are a way to depict functions with a two-dimensional input and a one-dimensional output.

## How do you find the contour plot?

A contour is obtained by slicing the surface with a horizontal plane with equation z = c. Thus, the equation for the contour at height c is given by: f(x,y) = c. contour diagram to the graph of f.

## What are the 3 types of contour lines?

There are 3 kinds of contour lines you’ll see on a map: intermediate, index, and supplementary.

- Index lines are the thickest contour lines and are usually labeled with a number at one point along the line.
- Intermediate lines are the thinner, more common, lines between the index lines.

## How do you find the slope of a contour map?

Measuring slopes on a contour map: – Find the elevations of the contour lines on each side of it. – Measure the distance between the contour lines (at right angles to the lines themselves). – Slope = “rise over run”, or vertical height increase over horizontal distance.

## What are the 5 Rules of contour lines?

General Rules for Contour Lines | |
---|---|

1. | Contour lines connect points of equal elevation; therefore every point along a contour line is the exact same elevation. |

3. | Contour lines never split or divide. |

4. | Contour lines always separate points of higher elevation (uphill) from lower elevation (downhill). |

5. |

5

## How do you calculate contouring?

Divide the difference in elevation between the index lines by the number of contour lines from one index line to the next. In the example above, the distance 200 is divided by the number of lines, 5. The contour interval is equal to 200 / 5 = 40, or 40-unit contour intervals.

## How do you draw a contour line on a grid?

A general way to draw contour lines is to determine the values of f(x,y) at regular intervals of x and y, creating a grid of values. The location of a contour line can then be approximated by drawing it at or between the appropriate grid values.

## Can contour lines cross?

Contour lines never cross. They may come very close to each other (e.g. along a cliff), but by definition they may never cross each other. * This is because one location on the surface of Earth cannot be at two different elevations!

## What is a contour map used for?

Earth’s surface has many different kinds of landforms that vary widely in height and elevation. Contour maps show the elevations of these surface features, which allows you to look at a two-dimensional map to visualize the Earth in three dimensions.