Question: Which Information Does A Thicker Contour Line Provide Quizlet?

How do you find contour interval?

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..

Which information does a thicker contour line provide?

When contour lines are close together on a map, it shows a steeper slope of the terrain. In contrast, when contour lines are far apart, it shows a flatter terrain. The thicker, sometimes darker-brown, contour lines with an elevation number denoted are called index contours.

What is the contour interval quizlet?

A contour line on a topographic map connects points of equal elevation. The change in elevation from contour line to contour line is called the contour interval. such as 1,600 or 2,000 feet.

What is the importance of contour lines?

The purpose of contour lines is to represent the tridimensional shape of the terrestrial surface on a bidimensional map. Contour lines are the intersection of an horizontal plane parallel to the reference level and the topographical surface to describe. Consequently: Contour lines are always closed curves.

What information do contour lines provide quizlet?

Contour lines are used to show elevation on a topographic map. Lines or isolines on a map that connect points with the same elevation.

What is meant by a contour interval?

A contour line is a line drawn on a topographic map to indicate ground elevation or depression. A contour interval is the vertical distance or difference in elevation between contour lines. Index contours are bold or thicker lines that appear at every fifth contour line.

What is every fifth contour line called?

A contour map is another name for a topographic map, illustrated from contour lines. … These lines are evenly spaced apart. This spacing is called the contour interval. To make topographic maps easier to read, every fifth contour line is an index contour. The index contour lines are the only ones labeled.

What information do contour lines provide?

A topographic map with contour lines connecting places that are the same height above sea level. Numbers on the lines give the height in feet. (Sea level is zero.) Lines drawn closely together indicate that a slope is steep.

What does it mean when contour lines are far apart?

Contour lines that are relatively close together indicate a slope that is fairly steep. Contour lines that are further apart indicates a slope that is relatively flat.

What are contour lines in art?

A contour line defines the outline of a form, as well as interior structure, without the use of shading. A fundamental basis of drawing, contour lines are usually the first technique children adopt to draw people, houses, and trees.

What are the three main types of topography?

Topographic maps depict four main types of features:Landforms: hills, valleys, gullies, ridges…Water courses: rivers, swamps, coastal…Vegetation: national parks, farmland, plantations…Manmade: buildings, roads, property boundaries, political boundaries…

What are bold contour lines called?

The elevation difference between two adjacent contour lines is called the contour interval (CI). Usually the contour interval is noted on the map legend. In most topographic maps every 5th contour line is drawn in bold print or wider than other contours. Such lines are called index contour lines.

What are the 5 Rules of contour lines?

Rule 1 – every point of a contour line has the same elevation. Rule 2 – contour lines separate uphill from downhill. Rule 3 – contour lines do not touch or cross each other except at a cliff. Rule 4 – every 5th contour line is darker in color.

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.More items…

How do contour lines work?

Contour lines are lines drawn on a map connecting points of equal elevation, meaning if you physically followed a contour line, elevation would remain constant. Contour lines show elevation and the shape of the terrain. … In order to keep things simple, topographic maps show lines for certain elevations only.